How far in advance is a caterer usually booked? I still don't have a firm wedding date yet, although it's looking like it will be mid- to late- September of this year. It will be another week or two before I'm sure (our preferred venue might have an opening on 9/14; if that doesn't work out it will be 9/28 at our second choice venue). Will (the good) caterers already be booked up by then?