I haven't stayed in Windsor Palms, but I have stayed at sub-divisions close-by. It is a new resort and very popular - I'm sure you'll be thrilled.
The best/shortest route into Disney is via the Sherberth Road. Drive up to the US192 on Sand Hill Road/Formosa Gardens Boulevard. Turn right onto 192 (travelling east). At the next set of lights (Sherberth Road/Entry Point Road) turn left onto Sherberth Road. Follow this road down to the next set of lights (about a mile - it twists around a bit, but just stick with it). At the lights, turn right and you are on WDW property. If your destination is Animal Kingdom, you will pass the entrance (on your left) after a couple of hundred yards - you need to double back on yourself. For everywhere else, just follow the signs.