I have a hell of a time sitting for longer than 3 or 4 hours at a time. I hunt Missouri and Montana whitetails and here is something that has always worked well for me. I sit for a few hours in the morning and maybe until 10 or 11 if I can wait that long. Then I still hunt. Now those young pines are PERFECT for still hunting, IF you do it right. Make sure you are moving into the wind. Now if a buck is up and moving, 80-90% of the time, the'll move into the wind, so you are looking for something bedded or maybe moving cross wind. Step slow, very slow, and take a good pair of binos. Every time you stop, you glass, ALOT. It takes practice but it can be done. Follow the deer trails. And make sure to squat down and look under the trees and pine boughs ahead, around and behind you. In thick cover like that always check your 6 (behind you). If they are there, and you are moving quietly, as long as they don't wind you, you'll catch them bedded. You just have to see them before they get up to run. If they don't know what you are, they usually won't expend the energy running, unless they've been hunted hard. Also, I'd use pleanty of doe scent on your boots and pant lets. On occasion, find a good spot to sit and sit for 15-20 minutes watching your backtrail. It's much more exciting than stand hunting, and quite an accomplishment to get one this way. I've done it for years, and absolutely love it.