This is the beauty of RV'ing. I had an old boy - 16+. He loved going in the RV. He did his best to keep up with the other 2 younger dogs. No way would I go anywhere and leave an old dog in a kennel or even with anyone I know. They need a lot of care and it is great to be able to take them with us.
I kept a belly band on him with a baby diaper to absorb. He had to piddle a lot due to being on steroids for his back. Even if he didn't have to potty when the others went out for duty call, he'd go to the door for his turn, just to walk around outside a bit. He walked in the Gulf waters on a FL trip and absolutely loved it.
You are making bittersweet memories with your little old guy. You have to love the seniors. I know my guy had a stubborn, little old man attitude. He never gave up and kept on keeping on.
Have fun with your little old guy. Every day is a gift and you're making memories that will stay with you forever.
I'm glad the CG's don't give you a hard time about him being off lead, under the circumstances. I would think just wearing a collar could also set him off - no?? Just the weight of the collar against the trachea can probably do it.
Anyways, good luck and have fun.