Wonderful news!! Thanks for sharing.
A suggestion, for what it's worth: Before you alter your plans to accomodate their wishes, get a confirmation that they are actually going to come. I wouldn't adjust the wedding for them, unless you know they actually WILL be there.
I know someone who made all kinds of concessions to please witness friends, for their son's wedding (with permission of the couple of course) (he wasn't df'd, just not ever a dub) and in the end, NO ONE came of their JW friends. It was sad for all of them.
Marilyn (aka Mulan)
"No one can take advantage of you, without your permission." Ann Landers