It is hit or miss with propane delivery. I am currently in Maine, called 3 propane companies - first 2 don't deliver to cg's - third one does - with no delivery charge!! wow. The cg has a propane fill, but as you know, with a motorhome, that means moving to their fill location - a lot of work. The cg does not allow their propane company fill guests tanks, that profit thing :)
When I am in the north for part of the winter, I use an aux 100 lb tank (rent from cg) supplemented with my own aux 30 lb tank hooked up with an "extend a stay" - very convenient. You might want to look into that, then you can just take your aux tank, 20-30 lbs to the fill station.