I agree with Spocky that DLP is the most beautiful of all Magic Kingdoms (well, at least the three that I've visited). If you can manage to spend two days there you will have a little more time to appreciate the wonderful detail that the Imagineers put into the park, as well as the brilliant updates to classic rides such as Space Mountain and Phantom Manor (Haunted Mansion).
Queues (lines) can get very long at DLP during the busier summer months. I therefore recommend getting there as early as you can - up until 11am most queues are less than 20 minutes. Queues for Peter Pan are amongst the longest in the park (for no good reason), so make sure you get a FastPass ticket early in the day. However, queues for Pirates are usually the shortest of all the major rides (again for no good reason), so it might be a good ride to do mid-afternoon when everything else is very busy. The Tarzan and Mulan shows are also worth making time for. Restaurants get very busy from 12.30 to 2.30, but there are several restaurants in Disney Village which are much quieter at lunch time.
Regards
Rob