ditto to GhostRider's comments!
Also, being that it is just for this event ... most such events allow for sleeves to be pinned with safety pins, knowing that the owners do not want the sleeves on the quilt. Be sure to ask, that this is OK. Again, follow the same guidelines as above.
My other thought would be, to add the sleeve, after the washing of the quilt. That way, you can press the sleeve well and can have it looking good. And too, pre-wash or not, according to your quilt.
Last edited by QuiltE; 07-29-2013 at 05:27 AM.