I would box them up and ship them to the resort when you are 1 week out and then they will be there waiting for you.
I shipped 2 boxes yesterday via UPS from Indy to WL and total weight to the two was close to 20 pounds and the cost was $35.00-- but we sent the babies wipes, dipes, swim dipes, bottles, jars of food (this was the bulk of the weight) Tink gifts, snacks, stroller decorations for
MNSSHP, and batteries. IMO it was very reasonable in price and very high in convience.
HTH!