I use passive humidification even at home, so the humidifier is always off.
I have a 12v cord for the CPAP, it is way more efficient than using an inverter to power the CPAP. I added a cigarette lighter plug on the side of the bed.
Gary
2019 Keystone Laredo 255SRL
2009 GMC Sierra 2500 4x4 Crew cab short bed