mid-June this year, the fish should be well on their way to spreading out into their summer haunts, though they will likely be shallow, shouldn't have to go deeper than 20. I have no experience on Horwood specifically, but don't be shy to try very shallow water in mid-June (4-8 feet), and if you're experienced with jigging artificials, you probably wont need bait most of the time either. Husky jerks and split tail/paddle tail baits account for my most of my walleye this time of year!