Scancal.org live scanner is always 100% fire when majority of northern region starts fire season. Covers TGU, SHU, SHF, LNF, MNF, the relevant ground and air tacticals, commands, etc. During major incidents it may put priority on that particular incident's Command and Air Tactics. I can hit BTU, PNF, and east side LNU major incidents also if nobody else can at that moment. Typically those areas are covered by other online scanners.
Offseason has Tehama SO, Red Bluff PD and Redding CHP.