I usually try to do it a few times a year. Opening day of rifle season here in Michigan I always sit sun up to sun down. There is so much pressure here in northern Michigan that they move all day and I've seen a lot of big bucks during mid day.
Lots of rest! Be sure to take vitamin D3, vitamin C and zinc supplements. Keep in mind vitamin D is a fat soluble vitamin so it requires you to eat it with a meal in order for your body to absorb it. Best of luck! Feel better soon!