I jioned a camp 2 years ago in Tioga County. This is after years of going up that way to fish and hunt. The first year I was there about 7 or 8 times, and 07 I was up 6 times due to low water and excessive heat. I'm already planing several trips this year, but a lot depends on the weather. More rain means more trips. Less rain means fewer trips. Anyway you have to love the area and and the commitment before buying a place. Real Estate has gone up in the Northern Tier, it will go down a little due tot he credit crunch, how much remains to be seen.
As for where, you have to consider where you like fishing, where our club is there are 100's of trout streams to chose from and you would have to fish any more then once in a lifetime and wouldn't cover them all.
On the other hand if you don't like remoteness, or your wife/girlfriend doesn't like remoteness it isn't for you. We've got electricity, and no plumbing, the heat is a wood stove, this tend to keep women away.
I live in SE PA and fish those streams during the week and on weekends that I don't go north, I fish streams a little furether away. Check out SP's and SF's, they all have access to trout streams and you can camp or get cabins in SP's you can camp in SF's but you need a permit, the permit is a safety thing, the rangers need to know who's there camping in case they have to get you out for some reason, they also don't want you camping in areas where there are bear problems. I've fished over 500 different trout streams in PA and I know what I like so my choice wasn't hard, it is amazing how good fishing is sometimes in NC PA and PA in general.
And if you look at the cabin in the photo it is up on a block foundation, which indicates to me it is in the flood plain of Pine Creek.