When you check out, Put any food in grocery bags.
and get luggage together. Call the bell hop, and have him xfer the stuff over from one resort to the other. Get a receipt, and tell him of any items that need to be refrigerated, and / or frozen.
The stuff will magically appear around 4 p.m. at the new resort. Check-in, and ask at check-in to have it brought up to your room.
Now, that being said, expensive items shouldn't be left unattended, because anyone could go thru your bags.
So don't pack any jewelry unless you wear it, don't put money in your luggage, or leave expensive camcorder out, etc...
But it's easy and convenient.
Then you can either go to your new resort, check-in, but won't get room number until later (probably), or....
go to a park, and return later that evening.
I usually tip the bellman coming and going ($5 each, for a total of $10 for convenience).
Hope this helps,
Goldi