From your question, it sounds like you already have a plan to supply your body with calories. I'll further assume you will have protein and fat, not just carbohydrates.
With those covered, you then need vitamins and minerals. Fiber is a good idea, too.
It is possible to be healthy eating only wild animal foods (hunting / trapping) for quite some time, but you have to do it right. Eat the fat and the organs, as they are nutrient rich. (Lions eat only the organs, and leave the muscle to scavengers!) Liver is rich in Vitamin A, which is great but must be balanced with Vitamin D.
Very lean meats such as rabbit will leave you nutrient-deficient (if that's all you eat), so you'll still need to fill in the gaps another way.
If you learn a few edible wild plants for your area, you can round out your nutritional needs very nicely. I believe that wild plants tend to have much higher mineral and vitamin content than farmed plants.
Here in Pacific Northwest, I would focus on:
Miner's lettuce, so named because miners would eat it for this very reason. It's very tasty.
Stinging Nettle is very nutritious. I eat it raw, but most people will steam or boil it to avoid the stingers. The stems are good for cordage - maybe a bracelet to remember your trip.
Dandelion is nutritious and easy to find in many places. I love the yellow flowers, but dislike the stems immensely. Leaves are good, especially when new. Don't confuse it with catsear aka false dandelion.
These plants are easy to find & eat, and give you fresh leafy greens that you can't pack with you. To learn more, you can take a wild edibles class and get an edible wild plants book for your region.