I tried a local RV dealer in Mason City who was very unhelpful for the most part and said they don't do any service, but he did grudgingly give me the name of a propane dealer. The tank is built in to the coach, so after lunch we stowed everything loose, managed to bring the slide in on the house batteries, and drove to Mason City to get the propane filled.
The house batteries run the lights and the water pump. Thursday night we slept pretty well with the ceiling exhaust fan running in the bedroom but by Friday night, the house batteries were about dead.
Saturday morning a downpour started, but after several tries I got the generator fired up and ran it long enough to recharge the batteries, our phones, the hot spot, and my computer. Cooler weather made sleeping comfortable and we put the coffee pot on a table by the power post to plug it in. We reminded ourselves that the pioneers had it much rougher, but they didn't need to recharge everything. As one of the Glampers said, technology is wonderful until it doesn't work.