Too old for full-time RVing

I too am starting late, but we aren't going to get any younger so we might as well do what we can while we can. I will be 68 and DH 65 when we will live and travel in our 5th wheel starting next spring. Yes, I read blogs about 50 year olds who are fulltime and doing all these adventure activities that I know we won't be able to do, but I am in remission from cancer and otherwise both of us are in good health. We certainly don't want to spend our retirement sitting at home in our recliners and staring at each other or the TV