We always try to check in, if we can't, we check our bags and head to the parks. If the room is ready we go up, unpack very quickly and THEN head to the parks. I can't imagine getting to your resort before 4 PM and NOT going to the parks! Even if you don't do rides you can walk around the Epcot countries, grab a frozen margarita in Mexico, and just soak up the great Fl weather! Or, go to a park and catch the afternoon parade.