RALIKA,
My Dh and I went this past February 7-14th. I felt like this was a good time to go. It was cold however, and we really did not adquately prepare for this. The crowd level was not too bad. It was chaotic Monday, the 7th at the parks, but I think this was because the SuperBowl was Sunday and in FL. I can't give you any advice about Pop. I've never stayed there before, however we are staying there for our next trip July 24-27th.
I would try to stay as many days as you can. This way you can go at a relaxed pace and won't fell rushed. We went for 8days in Feb and it was perfect. We are only staying 4 days on this next trip because it is a very, very last minute budget trip. When we go in Feb. 2006 for our 1 yr anniversary we will be staying 6 days.
Hope this helps!!
-Nicole
WL Feb. 2005
Pop Century July 2005
GF or OKW Feb. 2006