i have taken 1 buck with a bow in 3 years of archery hunting. it was on the ground. i have spent a lot of time both in stands and on the ground, and although i prefer to be in a tree stand for the visibility... sometimes the ground is the only choice. i have found that taking a saw and pruning shears is very helpful for making a quick make-shift blind... i shot a buck at 9 yards as he came in to rattling...bottom line is that i think it is mostly about confidence in your choice of spots and your ability to be patient.

good luck