Answers from Fairbanks in the "Interior" of the state.
1. lake trout, rainbow trout, landlocked salmon(silvers), arctic char, burbot, and pike.
2. over 3 feet on the lakes, rivers may be less.
3. ice houses have to be off the lakes by the end of April, latest I ever walked on was the second week of May. Have pictures of my truck on the ice as late as April 29th.