I don't know if I would shy away from the one bear areas. They can hold bigger bears and better spot and stalk opportunities. A lot of the two bear areas with require horses to get into areas where the bears are not.
This will help
http://fishandgame.idaho.gov/ifwis/huntplanner/huntplanner.aspx. It is nice, because you select the unit and it will show you the harvest statistics.
Unit 6/7 near the town of Avery along the St. Joe River would be a good place, just follow the snow line up, the bears will be looking to eat some winter kill / shrubs.
Unit 10/12 is a real good place, but you will need horses to access the better areas. Along US 12 will be hunted heavily. Not really much spot and stalk around the lochsa river, but it is a good spot to bait.
Unit 17 Talking to the folks up there last year. The north or east fork of Moose Creek would be a good place to go, but you'll need horses. South of Hoodoo Lake would be another good spot to go.
Unit 20A you can access through the town of Warren, Id and take the road along the south fork of the Salmon. the south fork of the Salmon will have bears. I would take a chainsaw or saw, because there is a lot of dead fall through the past of Warren.
The Salmon Zone can be hunted through a jet boat or on horses. There is some access, but very little.
A lot of the two bear areas have difficult access and the access they have gets hunted pretty well.
Unit 19A or Unit 1 would be areas I would consider with a one bear tag.
19A doesn't get hunted for bear that often, but I saw a lot of sign especially along the china creek area last year. I also missed a big black bear there last year.
Unit 1 is just a special place. No baiting here, because of Grizz. Priest Lake is chalk full of black bears.
I would look at harvest reports and call the rangers. It shouldn't be a problem finding bears in Idaho in most of the units bordering and in the wilderness areas. Especially from the middle fork north.
