Seed them thick!! Can you work up soil? Even a pallet with some bricks but sure would be better to get a harrow with some bricks on top. Can you fertilize??? I'd put the wood to P&K, like a LOT and add some Pelletized lime if needed. You are sure planting them late so don't waste any time (unless all you're going for is an early October plot that will be toast soon after that). Do it right and it'll be good, skip steps and you're wasting your time. Good luck, I'm sure it'll work out!