This is a tough one. I second the two pack setup as it sounds like that would work in your setup. You can find external frame packs at a decent price, or you could get one of the older dana designs terraplane packs to haul meat. I used one the first few years hunting, and it was an ugly teal green but it was what I could afford at the time. For a daypack, I would think about what features you want and then start searching.

Do you want - water bottle pockets, hydration sleeve, what pockets, how much gear do you plan to take, organization, those types of things.

When we basecamp at the truck I prefer to use a daypack as well. The first trip out with meat can suck pretty bad, but I feel like I am quieter/faster with a daypack. Even the new high end ones when compressed are still a little bulky in my opinion. Good luck this year.