As long as you are not "picky", you can check into any available cabin (and any resort room) starting at 605am in the morning of your arrival day.
Every arriving guest has a room/cabin pre-assigned before arrival based on empty available units the night before, your planned arrival time (if entered on your
MDE Early Online Checkin), and guests leaving that day where the room/cabin would have to be cleaned/prepared for a new guest.
If you arrive at FW on your check-in morning and they say your cabin is not ready, ask if there is "any cabin available right now" and they will swap you over to one assuming they're not slammed full. You can go and drop your things at the cabin including your perishables. Of course, if you show up at the early arrival time, you might get an empty one that's already waiting for you.
Again, if you are willing to take ANY available cabin and aren't picky as to if its near a bus stop or not, near the pool or not, etc., you might get in just fine.
Bama Ed