The trick is using alternative power sources wherever/whenever possible. If you're at a campground with electric;
1-Run water heater on electric only (you can use BOTH electric & propane if there is high demand for hot water.... like showers back to back).
2-Use electric heaters (we have the fireplace and a Lasco pedestal heater)
3-Run fridge on electric once you get to your destination (Auto setting)
The furnace and hot water heater (on propane) really suck up propane and can deplete a 30 lb tank in a matter of days.
We have been full timing in PA, NC, SC, VA, & GA since June and am still on the first tank. DW does do a fair amount of cooking on the stove & oven (when it's not a BBQ grill type thing). I do run the fridge on propane during trips between destinations (usually 4-6 hour trips). I've only used the furnace once this year just as a precaution when the overnight temps dipped to the mid 25's one night.....probably didn't need to as it didn't stay that low for very long. The fireplace and pedestal heater keep it mid to high 60's inside even down near freezing outside.