Tok - Hills with trees which makes bow hunting easier, water is typically lower in the valleys, maybe more scattered herd in the fall, or at least smaller groups that are spread out. Lots of tiaga ground cover (willows and grass). Wildfire smoke can make flying conditions difficult or even prevent access or move the animals out of an area. It can be stupid hot up through early September or dump a foot of snow on you.
Brooks - no trees to speak of away from river's edge, water can be all over due to ice melt from rock glacier pockets, rain miles away can cause local flooding which can prevent river crossings without boats, rocks all over the hills, low grass/moss on the slopes with tundra swamps in flatter areas in the valleys. Animals tend to group up earlier and may move through an area quicker. However, bulls are often stragglers to the larger groups so that can work out. Flying can stop due to fog and low cloud cover for days at a time.