Not sure if your looking specifically for fly in or not but there are a couple Outfitters I would recommend
Deadhorse Outfitters transports by Air-Boat in Unit 24A on the Koyukuk river.
North Star Outfitters I believe does both Air-boat and fly in not sure what the units they do drop camps...
I don't know a lot of guides for Caribou hunting you can look up Bearly Wounded Outfitters I believe he does guided Caribou hunts. You can also look up Deadhorse Outfitters up near Prudhoe Bay they do Drop Camps and I know they will take you out as a Solo hunter if you are still looking to go...
I am glad to see that you decided to go but as I see you are well aware going Solo on a hunt can be very dangerous. I definitely echo what mcseal2 said with having a sat phone or an INREACH. My personal preference is INREACH. If something goes south you don't have to call anyone you just push a...
I would recommend the Haul rd for sure. But I would recommend getting an outfitter to get you out past the 5 mile mark and the garbage tundra. Once you get out there a ways around the Echooka River and the Ivishak its not horrible ground and lots of Caribou. There are a couple outfitters up...