I'm looking to go in August 2012, probably around the 10th - 24th which I figured would fit in between our anniversary and my son going back to school

Does anyone have any information on crowd levels, weather, etc for that time of the year?
Driving seemed like the best option for our family, I'm not keen on air travel unless I'm in the pilot's seat and my wife's just not keen on it at all

Plus our family doesn't pack light so I figured we would drive down and be able to fit more luggage into the car and keep the kids' car seats during the fortnight
I've done a bit of research on it and have decided that staying on-site is probably the best decision because it allows us to pop in and out of the parks in case of any meltdowns or problems we have. Also, I personally think staying in a DISNEY hotel just adds to the DISNEY experience but I can't decide on which one to stay in ... I've not exactly got a budget in my head yet so I just want to best one for my family, has anyone got any suggestions?
What sort of little things can make our trip special?
Thanks