I live apox 1 1/2 hours south of WDW. No, shorts and tanks are not going to do it this time of year. You might be able to get away with shorts,tees and a sweatshirt for daytime. We get cold snaps here some days and if (when) this happens you will need long pants and sweatshirts. When the sun goes down you will also need long pants and a sweatshirt. Think layers when you pack for this time of year. If you have limited packing space plan on doing a load or two of wash.