I agree with DeerMe in choosing a spot for a ground blind that is where 2 or more trails intersect (or 1/2 way between 2 trails if they are both within range).
I would also add that if you make your blind completely enclosed on top with only a small entrance in one corner, it will be much darker inside, easier to see outside, and less chance for deer to spot your movements. You can also incorporate a tarp into the roof to make it waterproof.
Also, make your shooting hole(s) as small as it is practical to shoot out. With a crossbow, they shouldn't need to be very largeat all.
I would add that it's a good idea to practice from the blind to make sure of seat height, ability to get on target, and crossbow limb clearance.
Do the work as early in the year as possible, have everything set by mid-summer, then stay away until opening day. I have a friend who will never climb into a tree, but gets multiple deer every year by using this method. Good Luck!

IM jaybe