Please use this thread to discuss and search for all your logistical needs. Herein, you will find most/all the answers to your questions about hotels, parking, public transportation, restaurants, weather/clothing tips, park layout, insider tips, etc.
Best thing to do is to start by searching these threads, FIRST, using the "search this thread" feature at the top right of the top post.
2009 Thread (didn't find anything useful for 2009 - the best threads are from 2010 & 2011 anyway)
So, go at it and plan to your heart's content. Just please do it in this thread.
ps - I will not be following this thread so if you want me to add any helpful links to this first post, just PM me. See you in the Park.
Additional resources (you will need to update me as these links die/change/etc):
Hotels near GGP
VRBO.com (great resource for vacation rentals...lots of amazing homes/flats found in the City using this site)