I wired my inverter only to the inside receptacles circuit (#3 on the 24.1 I think). That basically powers the TVs and the few non-GFCI outlets in the rv that we use for things like cell/laptpo chargers, game console, and occasionally charging hand held vaccum, flashlight etc.
It's nice to have an auto transfer switch so the inverter can power the circuit automatically when you turn it on. The one I got had a transfer switch built in but you can buy them separately as well.
The important thing is keep the power lines to the battery as short as possible and use the proper gauge for the length you run.
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