Hard wired surge is out of the weather, not likely to be stolen (I don't feel that is a big threat most people are honest) and generally offers more features.
I would also consider double pane windows for insulation and noise reduction.
Fireplkace can be a nice option for both ambiance and some comfort on a chilly day.
It is all about personal choice and how you like to camp. Best of luck.
Al Laura (Lily & Breeze Portie Girls)
2011 F250 6.7 PS Tuxedo Black 4x4
11 305SKP- TPMS- RideRite air bags
Reese 16K Slider Wet Bolts