We waited until 4 days before our arrival date and called FW directly to request our preferred site. The number is 407-824-2727. They were very helpful and got all the info on our equipment, length, awnings, slide outs etc and were able to honor our loop request and accomodate us perfectly. CRS doesn't know the specifics of sites or camping equipment so what they put in the system isn't always enough info to get you the most appropriate site.