Here is a rough quick sketch of my typical shore blinds that I have 5 of on the coastal waters of NC. I have been building this blind for the last 40 years and has really served me well because high water and wave action usually doesn't effect it. However, it would be a simple and easy design to build anywhere and camouflages well with whatever the predominate brush is in the area. In my particular case, phragmites. I actually place a 1x4" board on either side of the 4x4 posts (top and bottom) and stick the rush (phragmites) in between the boards until tight and then have a piece of wire every 6 inches across the tops of the two boards to keep the rush from blowing to one side of the other during strong winds. After a couple of years of adding brush to the blind, the stuff is tight enough to so that only a few pieces in each "slot" brushes the blind. I have added a cantilevered top to the back that is hinged by running a bolt thru each side of the 'arms' of the top and the two back posts and is angled upwards toward the front by two 1"x 2" wood slats that will hook at various places to a pin in the back posts. This allows me to drop the top when the blind is not in use and to keep it from getting damaged in the off season by winds etc. The top is coverd with plastic mesh and a tarp for attaching rush for camo and to keep out the rain. I've got a better sketch than this quickie but haven't put my hands on it.
My dimensions are 8' across the front, 5' down the right side (seat side), 6' across the back w/seat, and 6' down the left side (this gives offset to help block view of ducks coming from the side) I also have access to a device that hog farmers use to keep the hogs off the ground in the hog parlors, called "tenderfoot", an expanded metal wrapped with plastic coating which I lay in the bottom of the blind. This keeps the inside of the blind from getting mushy and muddy and from miring up in the mud.