I agree with Garry, check the battery compartment as most HiLo's won't have room for two 6 volt golf type batteries. I added an extra group 24 to my 2294 Funlite. You can see the installation on the Yahoo forum here:
https://groups.yahoo.com/neo/groups/hilotrailers/photos/albums/768071871
Scroll down 3 rows and you will see the pics for the aux. battery installation. If you are going to do a lot of dry camping I would suggest you switch all of the lighting to LED as this seems to be the highest usage when camping. The refrigerator runs on gas (must have a 12V source) and other than occasional use of the water pump and possibility the furnace fan are the only other items using the battery. (maybe a TV, but who wants to ruin a nice camping trip with a TV?!?! )
The album shows some other modifications I have made. Probably the most important one is the installation of the baffles behind the refrigerator. This mod improves the efficiency of the refrigerator significantly.
I am also a SoCal HiLo owner. Welcome, Kenh