I fish for them in spring and then again in the fall...for me its easier to pattern them during these times of the year running in big schools and feeding more aggressively. I target them mostly with flies, and sometimes spinning gear and jigs and rapalas. They turn on when the water starts hitting the 50s so look out for them then. dont be scared to cover alot of water, if you arent catching anything then change your locations...when i wade for them i do best, its possible to stay with them fairly easy without spooking them too much. Ive always done well fly fishing for them this way in the spring in water thats 3-6 ft deep. In the spring if a late season snowstorm hits be sure to be on the water when its blowing in---this is a great time to hook up with lots of fish.
During the middle of the summer months i see alot of people doing well with them on bait...mussels mostly, if you are patient...
but yeah, as kirbydog said, being in the right place at the right time also helps---wipers tend to do what they want to do and are hard to predict
