There are few things I love better than hunting turkeys, with a longbow. I have had the pleasure of chasing them for 20 years on public land with traditional gear and 30 all together. OkKeith has some great advice, and used a similar method with success. I have harvested 10 wild turkeys with just longbow. I have tried pop up blinds, but not for me. Here are some things that I have learned, that I will share, hope helps:
1) Understand the season your hunting birds, Turkeys have a different attitude in fall than spring
2) Woodsmanship goes a long way, know the land you are hunting. I have found that knowing the terrain, I have been able to "circle" around the birds, get in front of them and set up for an ambush.
3) Know the language and your limits, I find that a few "select" calls are better on public land. Turkeys are very vocal and communicate often, but also are in tune with what is not right. Ray Eye, which I consider the most knowledge person out there, has excellent DVD's, well worth the money.
4) Use nature, as OkKeith said, they are very in tune with things out of place. I find that getting in front of them, and using pruners "backing into a shrub" works much better than blind.
5) Use Decoy in shade, keep in mind a decoy is a tool in the box and not guaranteed. I like to keep them in the shade, and like with deer to pull the attention away from me. I have harvested many birds without them, and feel that only use them when needed. I have seen birds "spook", when come across decoys used in wrong way.
6) Shot, we all know this is the hardest part. I found that when I decided to shoot, to commit to the shot, when I start the draw cycle, I follow through. If you are confident at 15-20 yards, then harvest them then. Do not try and get them closer, as this usually leads to getting busted.