I know this rather well due to hunting deer in Wisconsin. Yes, you sit there for a little over a week with very limited interaction. You can't make noise, you can't move too much. It's you and nature. Yes it is a type of meditation when you are not seeing any deer. For me this is what happens:
First half a day: I have tons of things to think about. Little niggling problems that I haven't had the time to sit and think about. Typically things like how can I best fix this at the house, what would the optimal method of doing this in this program be.
Second half of the day: Things quiet down a bit start thinking about the Wife, kids, finances... Figuring out what to do when this one or that one does something, how to best react...etc.
Day 2 first half: Hey look... nature... that tree is kinda neat... I wonder why it grew that way...
Day2 second half: Ok, ummmm what now.... kinda bored... what time is it... oh, two minutes since I last checked.
Day 3+: Find things to be interested in... a single squirrel or bird can be hours of entertainment and the highlight of your day.
6-15 minutes!?!? Man, I haven't even finished thinking about that hot girl I saw on the way in! lol