If you can bend down to kneel. A garden kneeler will work for you.
It has high side rails for you to use to assist you to get back up. AND it folds completely flat to fit in an RV storage bay. I keep one on board the MH all the time. It really makes getting back up painless and easy!
I've used them. Even if you have no disabilites this IMHO is a must if you have to go low for sewer hookups! Bonus is you flip it over and its a bench for higher tasks while you are sitting.
Can be bought at almost any store. Just read the specs and be sure tobuy the one that has heavy sturdy rails. In other words don't buy the cheap ones!
Lowes, Home Depo carry them also.
This is the wider deeper pad one with more sturdier rails
https://www.gardeners.com/buy/deep-seat-garden-kneeler/40-009.html#start=1Don't worry about the purple color, it comes in green too! :B
We must be willing to get rid of the life we've planned,
so as to have the life that is waiting for us.