According to the general state regulations spearing or bow fishing for pike is allowed across the state unless a specific area prohibits it. I checked the Susitna area regs and they don't mention it not being OK. Our regs are detailed to trout and salmon so the trash fish like pike are pretty much open season for anything goes fishing.
Up here the lakes get 2 to 6 feet of ice on them depending on how the winter is going. Most fish move into deeper water so that they can still get some oxygen.
Lakes with pike that are bigger than hammer handles are far off the roads and require a snowmachine to access.
Some complete jackasses have over the years transported pike into lakes in town that did not have them. This has wiped out several trout fisheries and stocking programs, and has also put some salmon runs in danger of being too low of a return to be fishable. Once these pike have eaten all the trout the only thing left is themselves and some sticklebacks. They seldom grow past 24 inches.