Pine Meadow Lake and Lake Wanosink are hike in lakes. Pine Meadow is about a 3 mile hike and it can be a bit of a zoo on weekends. The walk into Wanosink is a tad over a mile from the parking on 7 Lakes Drive at Lake Sebago. I've also done some stealth camping at Pine Meadow and Wanosink over the years. There is a nice little campsite on the shore of Wanoskink that is well shielded from the trail. Nobody will know you are there.
Lake Skenoto is another hike in and I've camped there too, as well as near Island Pond.
Looking at the trail map here are some other Harriman hike ins:
Upper Twin Lake
Lower Twin Lake
Summit Lake
Doodletown Lake
Turkey Hill Lake (used to be a big hangout for "cruisers". I was propositioned on a trail there while my wife was taking a pee in the woods. She came out of the woods and the guy took a look at her and said, "Oops, sorry" and moved on)
If you don't have maps you can get great trail maps here
http://www.nynjtc.org/product/harrim...ountain-trails
It shows all of the lakes, the trails to them and parking.
