As the other person said, they like places that are well structured for protection to avoid coyotes and predator birds. Old buildings, pile of fallen trees, big dead brush piles, etc. I wouldn't bother looking in the marsh area as they don't like being in mud/water. Reducing the coyote population would help your rabbit hunting chances also. I would avoid hunting in snow, very cold weather, as some may be out but I find they prefer being out on calm/warm days. I had one time while pheasant hunting, I was walking through the fields and their was a doe in this large brush pile. I was probably 5 - 10ft away from her for about 10 minutes until she jumped up and ran away once I continued on. I never even saw her until she went to get up.