We have enjoyed RVing with a trailer for many years. A health problem last summer left me needing a full-time oxygen supply and not in very good condition for wrestling with a truck and trailer, hitching and unhitching, set up, etc. We don't want to stay home so we're considering a Class A. We haven't had one before but it seems as if it would be less physically demanding than a trailer rig. I would appreciate hearing from someone who has had to make that adjustment. I would also really like to hear from someone who has travelled in a motorhome and managed to obtain oxygen bottle refills along the way. I think I can put a concentrator in the motorhome and use the generator to power it even though that will mean putting a lot of hours on the generator. I can use shore power at night, of course. Has anyone had experience in getting refills of the portable oxygen bottles? Thanks for your thoughts.