I thought Glacier Creek rd. accessed on the south side of Mt. Baker Hwy (SR542) across from Canyon creek road that gives access to BearPaw. If so, this should not affect riding BearPaw.
What this means is if there are climbers that want to summit Mt.Baker they're gonna have to head up the south side thru Schreibers. The biggest impact would be in May/June (if there's still enough snow to ride) when more climbers are getting out on the mountain.