Iodine tablets or water purification system is a NECESSITY.

Also, be VERY certain you CLOSELY inspect and fully cook any wild game that you kill to eat. Small game are like swingers, they carry a ton of diseases, viruses, and parasites, and you can't always tell on first glance that they're affected.

You probably aren't too far off on your estimate of 1.2-1.5lbs of food every day, but you have to remember, that doesn't include roughage weight. Eating 1.2-1.5lbs of protein only (rabbits, fish, etc etc) for too long will kill you. You'll need to pack a good source of carbs, and I'd recommend taking a dietary fiber supplement to keep u regular while you're on a relatively high protein diet. Depending on the time of year you decide to go, the wild flora may not be suitable to eat (and either way will likely leave you scouring badly).

I used to go on similar 1-2wk horseback trips in high school and college. A month is too long. If you can survive 2wks, then you can survive 2months, and frankly, after the first week, it gets old in a hurry.

Personally, I'd take enough food for 2wks, stay for 2wks, and go back to normal life.