We hunt out of ground blinds for deer and turkey, they are great. My advice would be:
1. Make sure your blind is big enough to be comfortable and allow for gear, tripod, multiple people, etc.
2. Tall enough to stand up in so you can stretch your legs on the long sits.
3. A comfy chair that does not make noise. The cheap blind chairs suck and you will not stay in the blind if you have garbage to sit on.
4. Get your blind in at least a week before the season so the animals can become accustom to it.
We use Barronet blinds and I love them.
We were sitting on a ridge on my son's second year of hunting. I knew the bear were crossing a saddle to get to the only water in the area. We sat in the blind watching the saddle....knowing the blind would hide my young son's movements. Mid afternoon we hear the brush behind the blind rustling and I thought we had a deer moving in. I motion to my son to sit real still. A few moments later, a young bear poked his head up and was literally within inches of the blind......the bears body and my right arm were less than a foot apart and only separted by the fabric. My son ended up shooting that bear at about 15 feet.
Blinds work.