Best place to get a unit map?
--Get a USFS forest map for the big picture and USGS 7.5 minute topo maps for your pack. I go overboard, probably, but I had tops for the whole unit when I went to Pioneer.
Worth calling the local biologist?
--You don't have anything to lose, but they get lots of calls and they can't give everyone a private honey hole. They can give you general info about the unit.
Can we access these places from a road or trailhead?
--Yep. When I hunted Pioneer, I had to get a mile to several miles from the road to get beyond ATVs and into elk, but getting around was pretty easy compared to some places I've hunted. I like to hike in at midday, hunt evening and morning, then relocate.
Is bear spray a necessity?
--No.
Avg temps in September?
--Often warmer than ideal. If it's warm, I figure I have about 24 hours from the time my elk hits the ground until I want to have it out of the back country. That limits striking distance.
Waterholes, calling or other??
--I spend a lot of time around elk and found Pioneer to be an interesting experience. General rifle season then was spike only, with very limited entry for branch-antlered bulls. That made for lots of nice bulls that had settled the pecking order already, and not many young bull stirring things up. Saw a lot of sleepy, peaceful bulls, but didn't hear a lot of calling. Bulls were not very responsive.
Stands and water holes have never been my thing for elk.