Nothing illegal about sitting in a treestand after shooting hours. As I’ve been told just don’t have an arrow nocked or gun loaded. If you can’t get out but can move enough to lower your bow to the ground that would make it pretty obvious too. Or case it in a soft easy to pack case.
Two weekends ago I sat in my tree a half hour past quitting time as 3 deer came in just at dark and walked out on the only real path I had out of the valley.
As for deer in the field, if your really stealthy and use the wind it is possible to walk right by them in the dark. I’ve done this many times, though I have always had a cut cornfield to sneak around them on which you can walk and hardly make a peek there (was chopped so no stubble left in field). I’ve started now on a couple stands I have that require traversing about 500 yards of field to get to the tree line and then another 200 to 400 yards to the stand(s), driving the ATV out to the treeline. There is a tree just on the other side of the old pasture fence in some overgrown pasture (that buffers the field and woods) I hide it under and then walk in the rest of the way. Being farm country the deer don’t seem to care too much about the ATV when I leave at night, even the ones right in my path just trot off far enough to get out of the way and then just watch me.
The ones that get me are every now and then when you don’t notice one as your walking out. Had one a couple years ago that my exis from the woods was thru a downed spot in a pasture fence and I then skirted along the edge of a corn field (not cut yet). I didn’t see/know there was a doe about 2 rows into that cornfield right near when I cross the fence. As I’m stepping out into the field edge she let me know she was there, think I jumped about 10′ into the air and was still shaking from the adrenaline surge when I got back to the house (which was still a good 500-600 yards from where the incident occurred).