I have a small pop-up hide... I never use it. But if I had a place I could set it up and leave it (so wildlife acclimated to it) it would probably be near ideal.
The same company makes "
bag hides." I have no experience with their products, but I use one I made myself from camo netting I bought cheap at the sporting store. Much easier to transport/use, especially with uneven terrain. I usually sit on the ground which is better for most things IMO. Mines less of a "bag" and more like a big rectangle closed on two edges (except lens opening). Sometimes I'll hook it on/prop it with branches instead of being "in" it.
BTW, my favorite thing for sitting on the ground is a
cheap folding boat seat... back support, dry, relatively comfortable for longer timeframes. But it weighs more and is kind of bulky to carry compared to just a pad.