We'll be at BWV 6/5 - 6/11 followed by VB 6/11 - 6/15.
I think the usual Gay Days schedule is the end of the first week in June. This is not an official Disney-sponsored activity, but one park is identified by Gay Day organizers as the "destination" park each of four days (I have no idea of the order) with MK being last, on the Saturday of the first weekend. This would make Saturday 6/5 the MK day (our day of arrival). Other parks would have been featured on Wednesday, Thursday, and Friday. Last year we were at WDW for the entire week, and it was our impression that the featured park is somewhat extra crowded on its designated day. We thought of it as being similar to an early entry day and avoided that park to avoid the extra crowds; thus we have been little affected by increased park attendance.
Ralph