Thanks everyone. It makes me feel better to hear from people who have BTDT.
Mr. Happy will get to reading this thread as soon as he is where he has an internet connection again. (I giggle inwardly every time I type 'Mr. Happy, BTW...) I discussed my hesitations with him over the phone last night and we agreed that asking here would be a good idea.
My gut tells me that the couple who contacted us would be a lot of fun. Hope I'm right...