Activity for Jeanette

I am interested in adding detachable sleeves to my wedding dress. I would wear the sleeves for the ceremony and remove them for the reception (because I get hot dancing!). The only issue is that the seamstress doing the bridal fitting says that...

I am sending a formal invitation to everyone (see below). I am not debating whether or not I want the RSVP information on the back (I definitely do for cost reasons and to save paper!). I just need advise on what to put at the bottom so people know...