Outback RV in Sherwood Park carries Lance campers. Might be worth a look!
https://www.lancecamper.com/dealer/i...ountry%20RV#TC
Ones that have a "basement" sit a bit higher, so the leap into the cabover bed is not at high. Of course that means your center of gravity is higher etc.
Been looking into this as well, since soon the kids won't be camping with us, and it would be great to camp and pull a boat too.
I'm in a similar situation as you, where my wife has knee issues, so the potential issues of climbing up into the camper, as well as entering the cabover bed need to be considered carefully.