I have fished the sanpoil a few times, I usually fish right around in the bay by the Keller Fairy there are some BIG KOKANEE in there if you can find them they run in the 2-3 pound range with the ocasional smaller one about 12-14", I also fish on Twin Lakes there are some bigger trout in there if you fish it right. There are 2 resorts on the water with some small acomadations, Log cabin Resort (south twin) and Rainbow Beach Resort (north twin), there is good water acces and adaquit boat launches for large boats.