When we were there in May we were told by a CM we would have to walk our packages to the newsstand for storage, that they would not deliver them there. I think that only certain stores deliver to the newsstand, others you have to walk your purchases. Be sure you check before you purchase.
We ended up renting a locker and 'batch shopping' and making a locker run.
Package delivery is one of the main reasons I stay onsite, but this last trip was at the end of a cross country RV trip, so we were off site at an RV park.