"you would think that maybe it being the main building with trails that go right through it that they might figure out a parking lot on that side of the forest. There’s a lot to unload your horse there..."
there's 2 things to consider -
1. The central forest is off limits to motorized use. You can travel on the access roads but not the trails. Allowing parking/unloading in that area MAY make some think it's OK to ride there.
2. Horses are not dirt bikes / ATV's. They don't make noise, they have big doe-eyes, you can pet them and you can see the face of the rider and say hello.
I remember when they consolidated the parking areas and enforced it. It was specifically because of noise and too much motorized activity near the forest centre & in the central forest.
And I still think you're overstating the blind hills issue. I was in my truck last weekend and met 2 groups from trail tours and a group of ATV's with no issues for anybody. if you feel differently you should approach it in a manner that keeps you comfortable.
My point/belief is that the situation as it stands, is the best it will get, EVER. They're NOT going to do anything to make it easier for, or more attractive to motorized users.
All of which encourages me to go to the east forest, whether for riding, or walking. There's rarely anybody there, parking is a no hassle breeze and the single track is a nice +/- 20 km. loop that starts and ends at the parking lot.