Gary, I have had a permanent colostomy for over 4 years, now. I found that after the initial healing period, I had no problems with setting up or tearing down my 2003 Winnebago Minnie. We pull a toad on a dolly. We do not have hydrolic levelers.
My life is normal in every respect. The only thing I have a problem with is watching how much I lift. Then I ask for help. I use a two piece wafer and drainable bag system. It is very easy to care for at home or on the road. Be certain to carry an "emergency kit" of a complete system for each of your stomas. Not just the flanges and bags, but also any powders, pastes, cleansers, scissors, gloves and any other thing you use when you change.
I cannot speak for the nephrostomy. I would assume the restrictions are similar. I can see that dealing with the tubing could be a minor problem. But not insurmountable.
Sincerely,
Ed
