February is my favorite month to go. Very quiet in the morning, picking up in the afternoon. The only other time the parks are this light is just after summer the last week of August and the first couple weeks of September.
Late February is a great month to go. Temps are 55-75. Wear two t-shirts in the morning, change to 1 in the afternoon and do the water rides, they run, incredible.
You will be spoiled after doing this.