That period is still considered an off time. We are going on Valentines day {my birthday} as we have done in previous years and we still don't really run into in any problems crowd wise. Having said that, from the middle of February on through the week after Easter are pretty hectic times. Presidents week, spring breaks, Mardi Gras and Easter, all busy times until the last week of April into about the middle of May when Florida schools get out for the summer. You picked a good week. And I agree with WDWisTheBest, get to the Magic Kingdom as early as possible., half hour before they open in fact. It can get very busy any time of the year. Also, if your are looking for way to beat some of the early morning crowds, go to any park that is not having an early opening for guests staying on property. That really works for us.