so i did end up going there and fishing in two locations.
1. Naukuchiatal - didn't catch anything, but some local kids got a 3 pound carp on a hand line. Got a few bites though and one got away.But the water is completely brown and dirty. I was told that last year for some reason (maybe the weeds perrazi is talking about), huge numbers of fish, which included mahaseer, were congregating on the surface to take in oxygen. The local boatmen apparently took home loads of the fish by just killing them by whacking them dead with oars !!! The waters at Bheemtal looked a lot clearer and would be ok for fishing i would think.
2. Saattaal - This place is absolutely gorgeous. I was told Mahaseer are to be had early morning and late evening on live bait which is a small fish found in the lake. I tried to spin a small lure from a boat in the afternoon as i had to drive back to delhi... didn't catch anything again, but saw some monster mahaseer soaking in the sun on the surface. Would definitely be in the 15 - 20 kg range !! I repeatedly cast past the shoal and tried to reel it in across them so that it the lure would be clearly visible to them, but no such luck !!