Travel trailer with Rheumatoid Arthritis

I, too, have RA, fibromyalgia,and spinal stenosis (lots of chronic pain) which forced me to give up towing a TT w/WD bars..DH has dementia and has lost the ability to understand the procedure, so I sold my 24' trailer and van and recently bought a 25' used class c...Now I find myself with another kind of problem--getting up the step into the coach! The rise from the step onto the first "flat spot" is much higher than a standard riser so right now I am entering on my hands and knees until I find a better way. Exiting is a whole other problem..first the high rise situation,and the step tread itself is small,extending in such a short way that I have to turn sideways to exit safely which is VERY painful for me. I have researched online for step stools,etc.,but all seem to have the same heights which do not work in this situation.I am hoping someone can offer a lightweight,easy to store,solution for my problem...PLEASE! Our traveling will now be to local parks but at 74 and 82, we have "been there, done that, and even have the shirts for proof!" I am "too young" to give up my love of rving! (28 years of it,and many kinds of units,and thousands of wonderful miles of memories!! Janalee