Hi Shelia. I am a "fluffy" person also. I am also an orthopedically challenged person... one good arm, new knees, etc. I have a Casita SD
17 " and I do just fine working with it. I made sure to get the electric jack, which helps tremendously. At first I had a wee bit of trouble lowering the rear stabilizers, but Larry Gamble at Little House Customs showed me a couple of tricks and I now have no problems.
The bathroom is a little snug for showering, but you work it out with practice, otherwise it is fine. Make sure you get a good mattress to put in it to accommodate your little maladies and you should be comfortable.
At the Blue Bonnet Rally
this past April, a lady visiting my little Casita even laid on both beds to try out my mattresses. It gave her husband a chuckle when he found her chilling on the bed. One is store-bought and the twin on the side dinette is home-made. So come on out and visit the Pine Knot Rally
and bring your list of questions and all will be answered and then some.