We went last year Feb 21-25th and it was crowded, but managable. I've been enought to know that you need to get there early and use the fast passes to get to do what you want.
I always went to the park that didn't have the EMH's, however, We did go to Epcot on Friday (EMH's in evening) and it was crazy, but we were meeting friends from home that day and they wanted to go to Epcot. The fast passes for soaring were gone by 1:00 that day. We then went to MGM around 5:00 and were able to get a fast pass for RNRc with a return time within an hour at 5:00 pm. & ride the TOt with a 1/2 wait on that Friday night. We also got into Fantasmic at 7:20 for the 7;30 show and got seats-- We got the last row of seats, but still had seats. MGM EMH were for Saturday in the morning.
We went back to Epcot on Saturday and it wasn't very crowded in the morning. We rode TT twice & then rode Soarin with fast passes and grabbed another one on our way in all by 10:00.
I did notice that the crowds did definitely die down towards the end of the week. Have a great trip.!!