I've driven up the Haul Road a handful of times. Never archery hunted from the road, always flew in. It's a popular hunt in Alaska. If the caribou are there, I'm sure it can be an enjoyable hunt. If they're not, you're sight seeing like the rest. The central Arctic herd numbers are down lately. You'll hear some guys mention hiking in beyond the 5 mile corridor to rifle hunt. Knowing what I do about the tundra, I'd never do it but my personal tolerance for discomfort isn't what it once was. One option to consider is taking a raft for hunting the east side of the Sag River. It'll get you away from some guys, not all. Note, the Sag is a large swift ice cold river so know what you're getting into, even in dry years I doubt you can wade across.
If you make the drive, consider taking two spare tires and a few extra gas cans.