Sorry for the delay, I did not realize people could post questions here until now.
I agree $7000 is a lot of money.
There are 2 books that will make going it on your own easy and enjoyable. THe Milepost and The Travelers Guide to Alaskan Camping.
The wonder of AK like any place requires your schedule to be flexible to allow longer stays in some places and shorter ones in others.
I'd be glad to answer any specific questions you may have. Email me at
dlee@acuren.com