Memory gets holes in it with time but, I seem to recall a 6' sign in RRSP about 30 years ago that indicated alcohol was prohibited there. I don't recall seeing those signs recently. Enforcement of the alcohol ban would likely fall on the sewer and mining cops since the Parks belong to DNR.
The poaching would fall to MDC Enforcement Division, most of whom need to be in at least three places at once, because there simply aren't very many of them, one per county for the most part and I believe they are limited to 40 hour weeks. (Although I believe BSSP may have the use of four Agents because of it's location in two counties.)
So, if we want poaching slowed or stopped, it is up to each of us to make that phone call. 1-800-392-1111 On the other hand, if we just don't care that much or if we want to encourage and enable; we should just walk on by and not whine on the 'net about our own lack of responsibility. Several years ago I got the cell number for the local warden, I bet if you ask you can the cell # for the Agent near you.