When we lived in AK I hunted the Haul Road for a week one year. Well, me and a friend from Montana did... He didn't have the proper Bowhunter Education so he was using a rifle which made us get 5 miles off the road so he could actually hunt. The problem is getting 5 miles off that road! You need to walk about 10 - 15 miles to get 5 off the road... Always running into impassable water, at least in Sept. I suppose if you go later it would have been easier.
But, if you have the proper Bowhunter Education it is a lot of fun! I pretty much hunted from the time I got out of the truck, while he just walked. Ground hogs, Silver Fox, Ptarmigan, Spruce grouse, Musk Ox, Bears (Black and Griz), and or course Caribou. Get yourself a good set of glass if you go into that area... Very flat, and they will be worth their weight in gold!
We ended up with two Caribou, young/middle aged Bulls that I shot... We were actually outside of the the 5 mile corridor, but my friend set up and let me put a stalk on them bedded. Shot the first when he was still bedded, and the second when he got up and started feeding... Definitely not like your woodlot Whitetail!
But, I would really recommend not dropping two Caribou over 5 miles across the tundra from your ride! Bought killed us getting them out of there!