There are good chances that you will get lost. In particular, during the six days of Hajj the entire area of Makkah, Mina, Arafat and Muzdalifa gets very confusing. It is like a sea of humanity. Most people dressed in Ihram, there are tents all over the place. Some Hujjaj get disoriented and lose their way. If you get lost, there are "Pilgrim Assistance Booths" set up all over and they are chartered to help Hujjaj find their hotels, tents, Jamarat, Masajids, etc. For a group of people, it is advisable to agree on "well known" locations to gather in case somebody gets lost.
Designate a set place to meet (in case somebody from your group gets lost) outside Haram in Makkah. Select a noticeable landmark, e.g. Baab Abdul Aziz Gate. Designate a set place to meet in Mina, Arafat, & Muzdalifa. The landmark should be well known and accessible. Many people get lost in the huge crowds.
Designate a set place to meet outside Masjid in Medina. Select a noticeable landmark.
To avoid spending time in vain SEARCHING for various things that you need during Hajj, consider taking most of them with you from home. During Hajj there are long lines at almost all stores. Though there will be many doctors and physicians who will have an adequate command of English, you may find yourself in the position of "triage assessment". What is triage? When demand is very high (as in Hajj) medical resources are prioritized based upon patient symptoms and signs; a non-doctor or non-physician, who is less likely to speak English, usually undertakes this. It is critical at this juncture for quick and accurate translation of your symptoms is required.
If you are young and strong you should actively look out for those older or weaker than yourself and help them wherever possible. Treat others as you would wish them to treat yourself, your parents and children. Most importantly remember the words of the Prophet Muhammed S.A.W. who has said that we should not be angry. It is better if you pray in the front rows in the "Harma'in Shareef", but if you cannot make to the front rows due to the massive crowds then anywhere in the Haram is just as rewardable.
Get to the "Haram Shareef" early for each prayer if you want to pray inside in the Haram Shareef or close to "Ka'ba Shareef", or near Prophet Muhammad's S.A.W “Rauza-i-Aqdas" (tomb) in Medina. Before a prayer, it takes about an hour to enter the Harma'in Shareef and find a spot. On "Juma'a" it takes even longer to enter the Harma'in Shareef. You should not block doors and entrances of the Holy Haram by praying at them, even if you were trying to attain the reward of congregation prayer.
As a prayer time approaches, Hujjaj start sitting down for prayer in the front rows. In Makkah, although, others may still be performing Tawaf, the front rows start getting full. It gets harder to find spots to pray. Similarly it gets harder to make Tawaf when people start sitting down. Do not hinder Tawaf of other by sitting or performing prayer around or near Kaaba, by standing near the Black Stone or the "Maquamu Ibraheem" when it is crowded since these overcrowding harms others. During Hajj, the Haram Shareef is alive with activity all night. People perform Tawaf and Saiy all night.
In Madina, "Masjid-An-Nabawi the Haram is now open 24 hours, so be free to go any time of the day or night. Within Masjid-An-Nabawi there is an area "Rauzatul Janna", Garden of Paradise, marked with green or white carpeting. There are "Ustuwana" or "Sutun" (columns) that are also special. Layout of the special areas inside the Masjid-An-Nabawi. Consult your Hajj book for their importance. You need to get there early to be able to pray "Fardh", "Sunnah" or "Nafl" prayers.
To clarify, each and every space and corner of Masjid-An-Nabawi is full of blessings and benedictions. Similarly every corner of the Haram in Makkah is a blessing. The "women-only" prayer areas are in the Eastern section away from the "Qibla" at Masjid-An-Nabawi in Medina. Women hujjaj have special times to visit Prophet Muhammad's S.A.W. tomb in Masjid-An-Nabawi. Women should take advantage of those "women-only" times.
You are NOT allowed to carry boxes, grocery bags, shopping bags and backpacks in to the Haramain. Sometimes even "musallas" and water bottles are not allowed. It is better that you do not take them with you to the Haram’s.also cell phones with camera are not allowed in both the Harams.
During Hajj and Umrah seasons, if any item is left unattended, even for a short time, in Medina, Makkah, Mina, Arafat, Muzdalifa, etc. the item is generally removed. It will be lost. Thus keep your belongings, especially Al Quran, other books, ID cards, money, "Musalla", purses/wallets, slippers always with yourself or with somebody for safe keeping.
“Be careful with your money and in dealing with people. There are reports of pickpockets. Sad but true: even during Hajj people are trying to "scam" the Hujjaj with very heart jerking stories. Some of them totally false. May Allah SWT have Mercy on us. In addition, there is significant amount of theft and pick-pocketing (even while performing Tawaf and Saiy). In general, use commonsense with regards to your personal safety and property.
Be prepared for being "searched" by security police when entering the Harmain sharif. Female guards search "Hajja" and Male guards search "Haaji". AVOID ANY arguments with the Saudi police and officials. May Allah SWT forgive them and us, but some of them are arrogant, ruthless and offensive.
May Allah SWT accept your Hajj, give the best of rewards and make it easy for you. Ameen!