I light ours as part of set-up when we get to the CG. I "try" to remember to shut it down as part of break-down (sometimes I actually remember). My neighbor will shut his off at night to save a little gas. I don't think it's enough to fuss over. The biggest gas guzzler is the furnace - our electric space heater covers that nicely. We're comfortable down to the high 20's (so far).
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks