Spent all kinds of time driving up there last year during archery scouting for a Margaret muzzy tag.
You wont be alone. Some were heading down on horses also at what I believe is the main logging road down in from the 25 side. Pretty well rigs and camps from where the 25 crosses the muddy all the way till I turned off the 99 onto the 26. Don't think I saw any camps on the 99 unless some of the folks up at Bear meadow were hunters(likely). Lots of camps on the 25.