DW has the Respronics Everflow Q which is quiet enough for us. At home it’s in the closet and I ran a tube through the wall. In the MH it’s in the open closet. It’s a power hog at 3.0A AC and hence requires planning for overnight use ie about 33A DC which is about 50% overnight battery bank discharge for the current 4xGC2 batteries with just the oxygen machine. No problem when on shore power of course. It generates substantial overnight heat which is one reason the closet door is partially open. The closet is next to the bed but we quickly adapted to the noise. It’s also heavy to move in/out of the MH. For other reasons I bought a wagon but it certainly makes moving the oxygen machine and all other MH stuff quicker and easier.
We also have a pricey Activox LifeChoice portable machine which only uses 6.0A DC or about 12% battery discharge overnight.
No concern about pilot lights.