Yes, you can hunt in Proud Lake except in the area East of Wixom Rd and South of the Huron River (light gray on the DNR map here
Once you get into Proud Lk from the connect, go right, you'll be riding the loop counterclockwise. There's no rule on which way to ride any of the loops, but I usually ride them all counterclockwise except loop 1, which is OK either way, but I like it better CCW. These are directions recommended on an older map I have, which I don't think is posted anywhere, I can email it if anyone wants it, pm me.
Once you get out to the road (Childs Lake) from loop 4, you can continue straight across and finish the loop and come out by the RR tracks, or you could ride the two track leading away from the parking lot, take a right at the first signpost with a park map and you will come out at the same spot. Once you're there, you can start on loop 3 (there's a sign but it's not numbered, it has a green horseshoe I think). Or you could go over the RR tracks and turn left to go on Loop 2.
Hope that makes sense, John