Laura,
We (Myself, wife and 2 girls 7&5) have gone in May every year for the last 4 years....and we love it....you do miss all the spring break crowd. I will say however, that more and more parents are catching on to this time of year as being a good time to go....just in the time we have been going we have seen an increase in crowds....Having said that we never wait more than 30 minutes for any ride...if so Fast Pass is readily available and the weather is perfect..... So relax and enjoy your trip. We have already booked for May 2-9 2009, maybe we will run into you then....:animwink: