Is everyone up for the adventure and challenges of 5 newbies in a rental RV?
I have done it and in my opinion, manageable challenges will be:
- Proper clothing and bedding for the 7 days,
- Kitchen equipment, provisions and meal planning for 5x7,
- Balancing drive time, tour time and camp time,
- Having a safe place to stop and camp every night.
Whatever is not in the rental RV that you need, you need to bring in luggage or buy after you get there (Big 5, Walmart, etc.). Consider using checked luggage (collapsible duffel bags) for your bedding and kitchen supplies. You also have to plan and purchase food when you arrive and along the way (Time and $).
You need to do more planning for each day on the road and know where you will park each night. Without confirmed reservations, you need a plan B and a plan C. Looking for a safe place to park an RV after sundown is very stressful. For example, there may not be an open RV site within 25 miles of the South Rim. Suggest you pick one or two places to stay more than one night to give everyone some time off and balance that drive time.
If you have the resources, rent an RV for a weekend and camp in your driveway or nearby. Then everyone has an idea of what to expect on a 7 day trip.
I also suggest rethinking Sedona and Flagstaff on this trip due to altitude and weather in March.
Good Luck.