Spring break is always crazy

down there. We did the peak week (the week before Easter) as that's when we had the time to go down.
You'll be okay if you plan to use the extended park hours to your advantage. MK was pretty much open from 7a-3a each day we were there. Even though we had little kids, we would have them nap later in the day and go into the parks for evening EMH.

The parks all but cleared out after fireworks (EP and MK). We walked on to so much and DH loved it because there were no crowds.
If you plan to drive your car, get in there early! DHS parking lot was a nightmare (we had to circle out once, got back in line, and begged the traffic directing CM to let us go into the "closed" lot b/c we saw 3 open spaces. MK was at capacity

by 11a two of the 4 days we were there.
It is completely doable if you have reasonable expectations. Being Disney vets, you'll know what things you HAVE to do to make it a trip down there (for me, my trip is
not complete without at least 1 mountain, JC, and POTC). You definately have to prioritize what attractions you want to do and if you do get there early enough, be sure to use FP the best you can. Plan for it to be 10+ crowd levels and the weather will force you to use the heater and air conditioner in the same day (one day it dropped into the 40s

)
Best of luck with your trip!