Get off at Brighton exit (147) It's one exit past I23
Turn right and follow road (turns into Main Street, follow through "downtown" Brighton)
You'll pass the CVS and the sign for Ski Mount Brighton\
Turn left on Chilson
Go down about a mile and a half, sign on the right side for Brighton Rec. Area, turn LEFT (Bishop Lake Road)
About half a mile or so it turns into a dirt road, follow to booth (it'll be $4 entrance fee)
Follow past campground signs, pass lake on the right, and then you'll turn right into the parking lot.
Viola! You're there! And I'm happy. :-D
(Troy will post a map tomorrow in LJ)