Just a side thought on the rest of your Alaskan Trip Planning.
Planning is great - but use it as a framework only - there is so much to see and do in BC, Yukon and Alaska that it is important to build in flexibility. In our own trip we found ourselves shifting our itinerary around quite a bit - spending a lot more time in the smaller places (Dawson City, Haines, Homer, Seward) and a lot less time in the cities (Fairbanks, Anchorage). Our itinerary didn't go out the window - but it sure got altered on a regular basis.
Only other piece of advice - get away from the RV parks if you can and stick to public parks (National, State, Provincial, Territorial) - they might be a little shy on amenities but are pretty much all on stunning pieces of landscape - and they cost a fraction of what you will pay in an RV park.
Enjoy your trip - I'm envious.
Jay