Your info is correct. Even with the battery disconnect switch (the Guest switch) in the back of the coach, certain devices are still hard-wired to the battery. Thus the concerns of the engine computers, etc. having to be reset is non-existent; I assume these are always powered.
'07 Winnebago Journey 34H - CAT C7, Koni's, MCU's, SS Bell Crank, Safe-T-Plus
'07 HHR Toad, SMI AFO, Blue OX