When you get your fishing license make sure they give you the little handbook of rules, it will tell you everything you need to know.
If you plan on getting your boat into the water to do some fishing in late April and May, i would encourage you to target Salmon and Trout for a few of your trips out. Go to the website
www.fishlakewinni.com and go to the message board. this site has a group of folks who target these species and you will find plenty of information within past posts, as well as you can ask for advice.