Let it rest for a week and hunt a different area away from the bedding area and that particular food source. I would also consider hunting in the afternoon after having been busted twice in the morning. Rut is coming and the bucks conventional wisdom gets clouded at times. If the bed and food source are that close together, consider letting them rest until gun season when you can move off a bit.
I have a couple of areas where I would love to get a stand but entry into and out of the area would be impossible without detection. In my opinion, getting to the stand and out of the stand without being seen are as important as stand location.
I feel your pain. It sounds like you are doing everything right. Just stay after them and one will get close.