Ask the treating doctor before you buy, and ask your clinic which vaccinations Saudi Arabia requires.
The ministry says a woman is allowed to come for Umrah without a mahram. Ask the agency whether it has other conditions.
The duration of stay for arrivals with Umrah visas is 90 days.
Questions for the agency
How far is the hotel from Masjid al-Haram and Masjid an-Nabawi, and how long on foot at a slow pace? Are there lifts and step-free routes?
Can a wheelchair be arranged, and who pushes it and pays for it?
How long are the flights and layovers, and are there rest days between rituals?
Who is the mutawwif or group leader, and how many pilgrims does one guide look after?
MOTAC's guideline lists, among what an Umrah advert must state, the package price including takaful umrah for each pilgrim. Ask what that cover includes for existing health conditions, and ask for the policy in writing.
If someone is lost or needs help
Write the hotel name and agency phone number on a card in each older pilgrim's pocket, and agree a meeting point in case you get separated.
The Saudi ministry says a missing person report is made through the Enaya Center or one of the guidance centres around Masjid al-Haram. If the person has been missing for more than 24 hours, a report is also made to the police.
If a complaint about your group gets no response, you can file it at Enaya centres.