Here's what I did.
Steve: Like Dave, I couldn't bring myself to cut into the boat for shore power, because I wasn't sure how often we would use it. Actually, I am glad that I did wire the boat for shore power.All I did was put a male part of an extension cord, (a rather healthy one with 12 AWG wire), on the inside the Starboard coaming compartment. The other end of the wire goes to a box plastic box which is under the step and to starboard when you come in from the main hatchway. This is mounted with a little wooden bracket that I made. In the electrical box is a ground-fault receptacle, and fuse, and 3 LEDs that indicate that I have power, and that the fuse, and GFI are working. I also put a receptacle in front of the boat near the head, on the starboard side. I used silicone sealer to seal the connections. The receptacle near the head is used to power a fan, when we are in marinas in the summer, or to charge a cell phone. The other one under the step, is used to charge the battery, or run other electrical things including a bathroom heater, later in the fall. What makes this worthwhile is that when you use it, you don't have extension cords running all over the place. I don't use a 30 amp shore power cord. That would be too much weight and I am very consious about the weight of everything that we carry on our C-22. I put a shore power male connector onto an good extension cord that is plugged in to power the boat from shore. I left the female end of the extension cord as it was. Aldo