As with the rest I've found that pike will bite almost anytime. I find they're a little more active in the morning. That might just be because I do most of my fishing in the morning though. I don't know what they'll be after this early in the season, but I generally like to through spinner baits out for them, usually white and chartreuse work quite nicely. Pike are big time ambush predators, so fishing around weed beds and rock walls is a must. On Lake Ontario I like to find breakwalls around harbours. If the breakwall has a hole to allow boats to get out to the main lake this is a perfect spot for pike. They'll sit at the bottleneck waiting to ambush smaller fish traveling through. Not the best spot mid summer because boat traffic is sometimes really bad.
good luck with it, do enough bass fishing this summer and you're bound to hook on to a pike, you won't be disappointed!