Sorry if this goes long, but I have a few general questions.
1.  How early do you guys typically set up?
       I ask because the spot I'm looking at is a good 45 min-1hr hike from the parking lot.  I feel like 45 minutes before sunrise was not early enough last year.
2.  Do you tend to favor woods or fields to set up at?
       I know you set up where you can get good sight lines and where you've scouted birds, but I ask mainly because I'll be hunting a public area.  Being my first time hunting this spot, I don't know how many others will be out there, but I think it's a safe assumption most guys are going to look for the easy set ups- ie. the 5-6 fields adjacent to woods and a short walk from a parking area.  My area I'm favoring is an open woodland with steep ravines and high ridges and a far way from parking spots. But there are no good open fields to set up at the edges.
That's all for now, looking forward to the responses!