I agree about getting a 12V CPAP. There are some nice small ones that also come with 120V power supplies to double for regular travel machines. Even some that come with rechargeable battery packs that will power them for a full night.
Like others have said, I don't like being without options to make sure I can use my CPAP. I only skip the machine when backpacking and then only do backpack for overnights. But I feel the difference in the morning.
2012 Rockwood A122S
2008 Toyota Tundra Double Cab 4X4
Former owner of a 2002 Coleman Niagara GTE