Survivor: I agree with the fellas on the utility of scent blockers - I think it is money that could be better spent elsewhere. The trick is not to poo your pants and sit in it all day - that would probably alert a bigfoot. I have not seen cigarette smoke bother a whitetail as though they recognize it as a human contrivance and therefore dangerous, it is just smoke to them and that is what alerts them, unless they see you fidget about.
Camo is about the same: remember the old style wool black and red check shirt - still seems to work pretty well and the deer don't know what it is. Same with the different earth tones: greens, browns, grays, etc., they all blend in well.
Food: if you're going to be out for a couple of days and need to pack away a couple of meals that won't keep you up at night or make you uncomfortable, consider dry foods you can add water to and heat up. Rice is good, add a few dried veggies and some dried meat for flavor; oatmeals are good as are other dried cereals. I would definately stay away from spicey foods and smokey campfires, they both leave a stink too easily recognized by critters.
You may want to drop on down to the Recipe Forum and see if any of the posters have some good recipes you can take to the field with you. Good Luck and HTH. Mikey.