Hi there, we'll be there too. it will be our 5th visit this week and we wont be doing a park on Presidents day, the whole weekend is busy but not unmanagable if you use fastpass. We plan to do IOA on the Sunday, also the parks are open longer and have more parades. From the wednesday the parks start to quieten.
When do you go and how long for? If you can spare the time away from main parks I would have a shopping day or pool if its warm enough.
Saturday nights are always busy in restaurants, we once spent ages in a gridlock then had a long wait at the restaurant, so now we go somewhere very close on a saturday, never had a problem any other day.
If you have any specific questions fire away.