I recently camped next to a widower who was 93. He could not do the hiking trails but seemed to be enjoying his trip.
I am started to get up there in age. I find it is best to do a few chores a day to get ready to travel. I also have a lot of extra clothes and gear that is left in the RV. De-winterizing is pretty quick for me. I fill the water tank and add bleach. After a few hours, I run some water through the shower and faucet, empty the tank and refill with fresh water. That should be about it for any RV. The bed needs to be made but that is a chore that is no different than making the bed at home. Many of my spices, herbs, and kitchen supplies are in a box in the basement. None of that is essential and anything missing can be purchased at the first grocery stop. I will spend a couple of hours on clothing and miscellaneous items. Then the RV needs a good cleaning. All together I would guess an hour a day for a week should be way more than is needed. If that is too much, it might be time to consider assisted living arrangements.