Your situation looks very simular to one of my hunting areas. I had the same problem with deer still feeding when I wanted to walk to my stand.

Now I just wait untilthe sun starts to come up so I can see if there are deer still out in the field. I get to my stand a little later this way but that is ok. Many of the best bucks that I have seen or shot have been mid to later morning anyway. I would much rather get to my stand a little later than scare all the deer out of the area.