Keep in mind if you can smell the food, so can the Deer or whatever your hunting for...

I have the smallest Camel Backpack and it holds 70 oz. of water, along with my essentials if I score.
Like my knife, GPS, calls, rope, two freezer bags (1 for the heart and 1 for the liver), surgical gloves, a few paper towels, bino's, safety pack,
compass, small folding saw and small scentless spray bottle.

And now to your direct question the food... Plain turkey / ham or pb&j (nothing to stinky) and granola bars, already unwrapped in a baggie.

When / if I'm hunting a stand I can climb the tree with the pack on and hang it on a limb, it's that easy.
If I have my climber on my back then my bow is in one hand and my pack in the other.