@giles What is the condition/type of substrate where you want to plant this clover? Open hardwoods, grassy area, bare dirt, well-drained, poorly-drained, etc? I'm assuming this is in southern Ohio? If so, I think April is going to be too late for "frost seeding. And I think now is a bit too early. Not that something won't grow, but the question is whether or not it's enough to make it worth the effort, or cost. We're not talking about Rye or Oats here... Clover isn't fucking cheap. To go out and throw a bunch down willy-nilly and "hope for the best" is just foolish IMO. You're not making or breaking the quality of that deer population or the quality of that local habitat by slinging down an acre of clover and getting 20% germination. Not knowing the site, my vote is if you can't spread the seed at the ideal time, don't bother with it. Do it when you CAN make a reasonable impact.
Edit...
If you want to do something NOW that will benefit the deer, grab your chaps and a chainsaw instead of a seed spreader. Make some hinge cuts in select locations. Relieve competition from some of your hard mast trees. Create openings to the forest floor that will generate thick understory and choice woody/herbaceous browse and optimize cover. That's the kind of stuff that will draw in and keep the deer... Not a shitty patch of clover.