I really miss camping but don't know if I can do it alone

If I were in your shoes, I would go with a small Class C with 30 amp. The 30 amp cord is light enough and not so stiff so you should be able to handle it. I understand the 50 amp cord is huge, heavy and so stiff.

You would consider getting something or having automatic leveling system on your RV. The sewer connection should be ok. Get a small stool to sit on when you hook up everything if you need it. My husband has a bad back and uses the stool a lot.

Just Do It LOL