I have fished in the Port McNeil area lots over the years. There are some great crabbing area's around there. Try in 70 feet of water in a bay. But a word of warning. Do not leave your crab pot unattended out there or it will get stolen. There are some people who think that any crab pot is fair game. So make sure you can keep an eye on your pots while out on the water.
For camping there is a place just south of Port McNeil called Alder Bay Resort. It's a great place to camp and moore your boat at.
http://www.alderbayresort.com/ Turn off Highway 19 onto Beaver Cove Road. The entrance to Alder Bay Resort is on the left, 6 KM down Beaver Cove Road.
Make sure you get yourself some good charts for the area and have a marine radio, a GPS and a compass on board at all times. When the fog rolls in it can be impossible to see any land around you. So make sure you can get back in one piece.
As for what to use. We always had luck with a green or purple flasher and a small pink needle fish hoochie. Check with the people out there. It's funny how every year there seems to be a hot hoochie/flasher combination that everyone seems to use. Some years it's a purple flasher with a cop car hoochie. Other years it's a green flasher with a blue hoochie.
Rob