Matadog, what about a cruise that doesn't go too far out from the US boundaries? There are departures from TX, SC, even from PHL and Bayonne NJ. There are some really nice cruises that depart from the East Coast to Bermuda or the Bahamas. Bermuda has an excellent healthcare system (so I am told). We did a cruise to Bermuda, and it was wonderful. Bermuda is clean, safe, & friendly, but very $$! Most meals you will want to eat on board the ship if you choose to sail there. If you have teens with you, most cruises have lots of ship board activities (albeit expensive). If you want, send me a message and I can give you a link to a cruise consolidator that I have used (I can't PM yet), or google many options like "best cruises for teens", best cruises with Northeast US departures, etc. You will find a lot.
Trixie80, I think you would have to contact cruise companies (if you are interested in a cruise) that specialize in accessible travel. Also, google John Sage accessible travel. The author has been confined to a wheelchair for something like 23 years, and has lots of advice to share. You could also get a toilet lift, although you will have to ask around for one that would be portable. Do you have any much use of your arms? You can get an over the (existing) toilet chair with arms to help push yourself up. This in combo with the toilet lift will make things easier for you, although you would have to research and ask questions to find out what equipment would be portable.