Jashu,
I would agree, caribou ARE made for bowhunting...
But not on the haul road for a guy whose likely only going to do a trip like this once or twice in a life time!
I think the big thing with deer is opportunity. Seeing game (for me) is the fun part. Success isnt filling tags, look in my freezer haha, thankfully I can fish shew! The thing with caribou is your week stay on the haul road could turn into a camping trip with no real way change. SO if it's good it'll be great, you'll definatly have the time of your lives. If the caribou herd isnt around, you'll have a fun walkabout. Sure you'll see sheep, bears, muskox, moose, sasquatch....but it's not quite the hunt many give it credit for.
IF you can fly out, I'd consider bou, or atleast have that option to fly out mid hunt if the haul is devoid of animals. It's truely amazing how that place can be completely devoid of anything!!!
After thinking about everything, a boat hunt for deer would be something you wouldnt regret doing...on top of the fishing, shrimping and crabbing (if they offer and time allows).