That's how I did it in 2013, a trailer with all my gear, a freezer and a generator, it worked well, but I was well over $1250.
We are having a little disconnect on the thread though, the original poster is asking about float trips, that is a whole new issue with big cost.
There are very few places you can launch and end a float trip off a road system, and where you can its SUPER crowded.
Then there are more places where you can get dropped off by a plane and float out to a road, also can be very crowded.
Then the fly in- float and fly out scenario......definitely the least crowded but the most expensive.
Transportation in AK is without a doubt, the biggest cost.