Originally Posted by Daveu
To get really fancy, could have relay switch on the socket based on taping off the park tap of the ignitions switch, so the socket is dedicated circuit but is only live when ignition on, or in park. But that could also just mean more parts to fail
You are on the right track, but making things too complex. Use a powerlet socket as suggested by Ignatz. Wire the powerlet socket to the eastern beaver fuse panel. The wiring harness to the fuse panel has a built-in relay for on/off functions of accessories. When you understand how the eastern beaver fuse panel functions, you may decide that it is a good way to go.