If you isolate the converter, you may also isolate all the DC circuits that are driven by it. ALL your interior lights; fridge; and furnace are just the major items you might lose by "un-powering" the converter.
Easier to isolate the battery from the camper's charging circuit.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW