I fish Busch a lot and have had good success at almost every lake. I won't give away any secrets that can't be found on the MDC site, but I believe I can answer some of the questions posed. Muskie's are only in 35 and they are big. No one really fishes for them. Trout are in 21(C/R), 28 (C/R), 24, 22, and 23. Lakes 16, 31, and 32 are catch and release only and artificial lures only. I belevieve that 31 had smallmouth in it for awhile...they couldn't spawn successfully... and I haven't heard anyone catching any in years. There are a lot of small bass and large Bluegill in 16 and 31(very pretty lake). 32 is off colored and not a very pretty a lake to fish, but there are big fish in it. They have Catfish only lakes which are 3,4,5, and 7. They are stocked twice per month, but get fished heavily...use large shiner's for best results. Ther are a few Hybrids in 36 and 34. There are Flathead in 35 and I believe 33. There are some large bass to be found, but I have to keep some secrets.
I could go on, but I have fished every lake and pond in that place. You can fish 6am-9pm all year around, but it is not a place you want to get stranded (they close the gate at 10 and tow trucks can't really find you.) Bring a friend if you are going to stay after dark. You can rent boats at some of the lakes from April - October.
Clean up your trash if you go and follow the regulations. It can be challeging to fish, but if you are on your A game you can catch fish. As another poster said you need to get away from the parking lot's.