I've been the first week of May, in 2004, and I am going again this May...weather is great. Crowds are very good, if you are wise about which park on which day. Days that have Spectro are very busy at MK, since the parades are limited that week. One day we went on a Spectro day and it was jam packed, another day we went on a non spectro day and it was wonderful, low waits and low crowds.
The first week of May is one of my top choice weeks to visit, other than September or January.
Universal (1st time)
September 5-8 Portofino Bay
September 8-15 Poly GV Concierge
Oct 10-13 GF
Nov 16-19 Contemporary 14th Floor
We've stayed at:
Poly (Concierge),POR,POFQ,Pop WL (Concierge),AKL, Yacht Club (Concierge)
Boardwalk Inn (Concierge)