Dear Halftimer - I'm sorry to hear about your stroke, but happy about your attitude.
Please show this to your wife. Do not read another word yourself!
Dear Wife. Airstreaming seems to mean a lot to your husband. You could give him a great gift by learning to tow.
I'm single and 66 and I fulltime. I never towed a little red wagon behind a tricycle before I got my first Airstream. (I lost my ex 20 years ago - sweetest BOY I ever knew, but his zipper kept falling down in the presence of marginally attractive females and I guess I was just a bit too fastidious and cowardly to face up to the risks).
If you're lucky enough to have a good MAN, you might want to really fight your fear and learn to tow. Could you give him a gift that would give him more quality of life?
Take a course from a local truck driving school: don't let your husband try to teach you or you could become a widow when you show him where he can put the trunnion!
Once you learn, carry duct tape. Have him fold his hands in prayer, apply duct tape. Place duct tape over lips. You are now ready to tow!
If the former suggestion isn't enough? Would you like something like new furniture or a kitchen remodel and have him owe you BIG TIME... well learning to tow earns you the title:
SWMBO - she who must be obeyed
Just a thought. But seriously I do understand all your fears, had every one of them myself. It took me only about 3 days to feel, not exactly comfortable, but like I was on the road to being there. I still joke that I have delusions of adequacy.