RE: Question on strategy.....setting up at night
I don't know how the turkeys are in your area, but in NJ a lot of the birds on the game lands get blown out of the fields about 10 times a day, at least. Usually by joggers, mountain bikers, dog walkers, etc. They come back out within a half hour usually. So, if you go in, blow the birds out and set up your blind and leave they should be back out there within the hour.
I also don't see an issue getting in there early in the morning and setting it up either.