Depends on where you're camping.
If you have hookups, use the electric side since it's free.
If you're boondocking or dry camping, you have to use the propane side.
Propane heats faster than electric.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package