I've fished Aaron Mercer Reservoir several times. The road / gate is ONLY open, during the month of November. And it is patrolled, by State Police. You cannot pass the gate, until one hour before sunrise. They won't let you in, any earlier.
For the remainder of the year from the Dalton's quarry gate, it is a 6 mile, one-way, trek on FOOT or non-motorized BICYCLE ONLY! NO MOTORIZED VEHICLES OF ANY KIND, are allowed. Some dumb ass started a forest fire up there, back in the day. So we are LUCKY that it is open, at all!
As of last year--and due to more asshats, who have vandalized and trashed their private property--ONLY float tubes are allowed. NO other floating device, of any other kind is allowed. Only float tubes, and bank fishing is permitted.
All of this information came directly from Troopers, from Fred Braun at the City, and the property management company. I don't recall the name, of that company. But I believe that Fred, has those details.
The lake has native cutties, and some ILLEGALLY introduces smallies. So when you do go up there; feel free to remove as many legal smallies as your are allowed. They eat the cuttie's fry, which bugs me to no end. And do NOT keep, any of the native coho! I don't recall if coho retention is legal, or not. But PLEASE release them, if it is legal.
This water used to be PRIME, for large native cutties. But because of all of the crap mentioned above; it no longer contains large trout. Ruined by crowds, who don't give a damn about our fish, their habitat, nor the rights of PRIVATE property owners.
OK...rant over...