Hey Al, Let's give this another try. First of all, you are pushing the time frame a little bit for the walleyes, they will be biting and ready to go by May 1st, yes you can catch them now, but you would spend your time better hunting for Crappie or White Bass at this time.
Around May 1st, start to concentrate your walleye hunt using bottom bouncers with spinner rigs, "slow death method" or a slow, light finese method if you have a connection for leeches. I would suggest to you to Google "slow death fishing technique" and look particularly at the Gary Parson's video. Bottom Bouncing with spinner rigs is also available on Google. As for leeches, if you are anywhere by me, which is by the B.S. dam, leeches are not available unless you ship them in, which is legal, but very expensive, so let's forget about that option. Do some research on the internet. Generally, fish in 17 to 21 feet of water, the more structure the better, if you go out earlier than May 1st for walleye, fish at dusk or at night and fish much shallower.
I wish you the best, I am a transplant from Leech Lake/Cass Lake/Bemidji, Mn, guided for 7 years up north. I firmly believe, the walleye fishing, in Lower Bull, is better than the Cass Lake area, since the season down here is soooo much longer, and the fish are actually bigger on the average.
I wish you the best and God Bless you and your family,
Col Ron