RV Propane Systems
When your RV has been stored for a while the propane gas system may have a certain amount of air in the lines. It is a good idea when taking your RV out of storage to first turn on the gas bottle valve and then light one of the stove top burners.
This does two things: it purges the air from most of the system and it establishes a visual check that gas is present and flowing smoothly.
Once the stove burner lights and the flame is steady, then light the other appliances.
Do this at least a week or two before your planned vacation. This will allow you time to deal with any service or repairs needed before you head out on your trip.