Ecclesiastes 3:1 says "To everything there is a season, and a time to every purpose under the heaven" And even if you aren't religious, that statement is true. It appears that your camping season has lasted an impressive 40 years. Now it draws to a close and a new season begins.
DH & I had to stop towing about 3 years ago when his health took a dramatic turn for the worse. It was a very distressing decision. We have our camper permanently parked at a campground that we love, so now we go up there. It's nice, but not the same as hitting the open road and visiting different places. We have maintained friendships in an RV group, so we try to meet up with them 2-3 times a year at their Rallies. Sometimes we host at our campground (yesh!), sometimes we rent a local cabin for 2 days, and sometimes we just make it a day trip.
I wish you the best in this next season of your lives.