Like FT said, save your money. A transporter or a guide in all honesty would be your best bet and IMO create a better hunt in the long run.
I got a long story about my trip

But I will break it down to key points.
We took two boats from the Dalton crossing of the Yukon and went all the way down to the Koyokuk and up it. At 7 dollars avg for a gallon of gas it was close to a G everytime we stopped, Ruby, Tanana, Galena. Fuel consumption of a jet vs a prop, there is a huge difference. This is the one thing that totally killed the hunt for them, I got a registered permit and was able to hunt and got a nice bull. Had to turn in half a antler but the trip and memories where awesome. But because they did not plan for fuel consumption we ended up 20 miles shy of where they could use their permit.
If your boat breaks down ie jet unit goes out, there is another G for the barge to tow it and if it is late in the season they might have already stopped running so you will end up paying a G for a local to get it to that town and store it for the winter.
If your battery dies because you left the bilge pump on over night......how are you going to jump the motor or get it started? Plugs, filters, props, all those oh crap things that could go wrong.................
If your truck drops its transmission at the launch sight at the Yukon it is a G to get it towed back to FBX to get fixed.
If you get a moose you have to have a solid plan on getting it on a airplane and back home. The one I got sat in Galena for 8 days before it made it to Anchorage.
For the hunt itself.....Good wet weather gear, muck boots, hip boots are a necessity. Unless your sitting along the river watching up and down it long shots are rare, all the moose I saw could have been dropped within 150 yds of where I saw them. If you do get one have a plan for packing that joker out to the boat. We used a litter, two man carry, and a pac frame.
The river banks are pretty thick with willow but once you get past them it opens up.
I have never heard moose be so vocal. They respond to calling like nothing I have seen or experienced before.
There are bear there also, lots of track and end of the salmon run, take that into account.
When it was all said and done, those two gentle man dropped close to 12 G for a hunt they couldn't do because of poor planning on fuel consumption, a blown lower unit, towing a broke down boat on the Yukon, and dropping a tranny. If things would have went the way they wanted it the trip would have been about 7 G.
Hope that helps a little