Howdy butterbean, I guess my wife and I are in the same situation. I had no idea that there was such a group, certainly would be interesting to find out how others deal with the many issuses that limit our enjoyment.
We do not do the campground scene either, but prefere to be on the road or visiting friends and relatives who live away from our area.
Close to home we have this Park, Lansdowne Outdoor Recreational Development Association -Home-
The Park is mostly dedicated to Disabled or Seniors and the camping is open to all but is mostly used by disabled or seniors. We haven't been there yet, but maybe this year. If you find your web site we'd be interested.