RE: "Destination" food source = LONG sits
Jeff, I have been successful doing this is the past especially early and late season. What i would do if you can is make sure you get out there and do as much scouting as possible this summer. Keep an eye on the field you want to hunt and watch where the deer enter the field. Pay attention to the wind each evening, and where the deer enter the field with that wind. From my experience, mature bucks will enter the field using different trails with different winds, but are usually pretty consistant.
After gathering as much information as you possibly can, get in there and get your stand set. I know that field edges arent always optimal for tree stand placement. Don't be afraid to hunt from the ground. Early season is a great time to do this. Get in there with a saw and some logs and build yourself a nice little natural groundblind. It wont stick out to the deer like using a pop-up blind and they should be used to it within a a few days if they notice it at all. Being eye level with the deer just makes it that more intense!