While not an 'RV' grin.. I do have a unique story.
In college a couple years ago I was flying skydivers in Kansas. We had a family that was there on a reunion/vacation, and about 8 of them (mainly their teenage/college age kids) wanted to go on a tandem skydive. They researched us and called us up wondering if we would spend a day with them. No problem, I was going to pilot the jump plane and a few others were there for pack/jump support.
The family came out, and with them they had their 95 year old grandfather they were visiting, who was mainly bound to a wheelchair, but could move short distances. It was HOT, about 105F that day, miserable flying/jumping weather, with no AC in sight other than a vehicle. That man sat in his wheelchair all day, and wouldn't take any help from a family member to cool down or go back to the care home. He wanted to sit outside to watch the airplane fly, and to see his great grandkids jump out. His story was that in his early years he flew air mail in a Travel Air, and was also a bomber pilot during WWII.
One of the family members approached me and said his grandfather wanted to go up for a ride, just to get into the air and see people jump out of the airplane (we sell 'up seats' commonly to riders that don't jump). I counseled the family, concerned for his health. It was hot, bumpy, lots of altitude change, and he would be sitting on the floor. The old man demanded he get in that airplane. His basic saying to me was "I have more flight hours than you have living hours, young man". It was hard to argue, and the family gave the OK.
We equipped him with a parachute (required for everybody) and sat him on the floor right behind the pilot seat, and belted him in. I frequently checked on him, and with a very straight face he always gave me an OK. Up with 5 people to 10K feet, and back down with just me and the old man. On the ground we got him situated back into his wheelchair. The rest of the day he had a sly grin on his face. He loved it.
So, 95 would be my oldest passenger, in a unique way.