Last time, we did Garden Grocer and ended up with too much food (but then, we also did deluxe DP!). And the delivery fee was something like $12 (plus a minimum $40 order, I think)
This time, I'm planning to send down a box via USPS Priority a few days before we check-in (I think the large flat rate box is about $15 for 24 x 12 x 3) with stuff like nut/snack mixes, cereal, granola bars, packets of turkey pepperoni (DD loves this stuff), mix-in flavor packets for water, goldfish crackers, a few instant oatmeal packets, fruit snacks, tuna packs, summer sausage, etc. Basically stuff that doesn't need refrigeration until you open it, isn't chocolate covered, and can fit into a small backpack if we take it to the parks. If I have room, I'll add in the Horizon asceptic milk packs, or just get some milk at the resort. I'll order some water from anyplace that will deliver to Disney resorts and I'll be good to go!