Here is a summary of our recent search for permanent reserved moorage in Southeast Alaska, for 45' and 30 amp power. I hope this helps others who may be searching. Of course you should contact the harbors directly for the latest info.
Juneau: Not contacted.
Petersburg: Permanent slips available immediately.
Sitka: No permanent slips available, 7-9 year waiting list. Open moorage is available.
Ketchikan: No permanent slips available, 3-5 year waiting list. Open moorage is available.
Wrangell: Three permanent slips available immediately, two in Heritage Harbor one in Shoemaker harbor.
Is I understand it, "Open Moorage" means you have a place to dock, but it may not be the same place each time you return to the marina. Also in open moorage electricity rates are per day you are plugged in. Open moorage electricity is very expensive for long term use (>$200 per month). You will find this is offset by the very affordable moorage rates at all marinas. With permanent reserved moorage the electricity is based on actual consumption and is very reasonable.
All of the harbor personnel were friendly, and provided prompt and complete responses to my questions.
PS: We chose Wrangell.