Some good suggestions here, Al.
I've always said when I didn't feel comfortable on the two-wheelers I would be switching to a trike as I love being out there riding. I do GOBA each year and I see several trikes on the ride. They seem to handle the hills nicely and there is no danger of tipping over when the going gets slow up those hills. We have a few trike riders who join us on the park biking program. I've had to chance to try out one of them and really liked it. The lady who owns it also owns the same vehicle I have and it fits perfectly into the back
Good luck with whatever you decide.