Weddingbee boards

FI's aunt has graciously offered to host my shower.  Because both of our families (including the aunt) live in our hometown of PIttsburgh, that's where the shower will be held; however that means I and all but 1 of the BMs will need to travel.  That isn't the problem as I always assumed thats how it would be (the wedding is in our hometown, too).  The problem is date.  FI had suggested to his aunt Memorial Day Weekend to give the out-of-towners a little flexibility on flights.  FI just got a text this afternoon from his aunt asking if brunch on the Monday of MDW would work.  

I'm a little worried:

1.) with everyone getting out of Pittsburgh.  A brunch party might be done by 1 or 2pm, or it may not wrap up till 4 or 5pm.  I feel like that's just a bit rushed, and having it the Monday defeats the purpose of having it that weekend anyway.  I'd rather let everyone do their own thing with their holiday weekend, and we'll just do the shower any random Sunday.

2.) ppl will have their own holiday picnics annd pool openings with their kids and won't come to the shower.  I know my cousin throws a big shindig for everyone every year, which would wipeout about 75% of the guest list.

Is it appropriate for me to ask her to consider another weekend (or the Sat or Sund of MDW)?  I really appreciate her stepping in and offering to do this since I don't think I'd have a shower otherwise.  I've only met her once for about an hr or 2, so I'm not really comfortable saying anything.  What are your thoughts ladies?

EDIT: Oops, just saw I posted this in Babies.  I think there should be a way to edit this yourself OR make you have to manually choose a board before allowing to post.  I can NEVER remember to check it=(