RE: Bow shooting
First, if your comfortable shooting to 30 yards on the range, then you probably want to set your hunting limit at 20 or maybe 25 yard max.
Second, begginer bowhunters biggest mistake is judging distance. Some bow set-ups are more forgiving. Really fast bows shoot flatter(mine has 3 1/2" drop at 30 yards) and if you have a slower bow shooting a heavy arrow, judging distance is crucial, you have to be exact!
Third, you said this was on the ground. If your going to stand hunt, make sure you practice from your treestand height. Some "set-ups" are very differant elevated.
Good Luck!! You'll get'em next time!!
PRACTICE....PRACTICE....PRACTICE......SUCCESS!