We will be at Universal (Studios) on March 21st--myself, hubby, and two thirteen year old girls. We have advance purchased Express Pass tickets for the day at 35.99, which probably indicates a busy day. Assuming we get there early, would it be wise to try to do a few of the biggies when the lines are short and hold back on using the Express pass until later? I am thinking this might allow the girls to do a few rides (Mummy, MIB) twice. How long of a wait is there when using Express Pass on a fairly busy day?
Thanks for any insight!

Thanks for any insight!