November will be mild and can have some temp swings at times, maybe even get the rare off the wall cooler (40s-50s) day. But for the most part 70s and sunny, its post hurricane season and the rain isnt heavy around that time. Crowds are manageable.
Spring break is a crap shoot on weather. For instance, last week this time it was in the 60s, today its 85. And its the same way in March..temps can run from 70s to 90s depending on the front around. Also will likely get more rain in March than late November and in my opinion as a resident, crowds are worse in March than Thanksgiving weekend.
In either case, just plan it out, refresh, and have fun