Beast - Both accessed via Fortune Creek Rd. - Van Epps/Lk. Anne, you turn off and head up just before the road crosses Fortune Creek - Should have someone lead you in the first time, the trail is not marked and there are different routes in depending on ice and the ability of the rider.
For Gallagher, cross Forturne creek, the jeep trail is your 2nd left (about 1/2 to 3/4 mile after you cross Fortune. An easier way in is described above. Don't even think about access via Boulder Creek. I did that once on a motorcycle by myself and it was work; not to mention crossing the face of a mountain on a goat trail.
You can also get to Gallagher area to Lk. Anne via Chaincase hill, it head up from the Jeep Trail. Plenty of open area up there.....