Woohoo! Go for it Tony! I'd love to meet up with you and yours, and cannot imagine a better venue than around the time of this meet!

Lots of good suggestions in this thread so far, and you already know what I settled on for an itinary -- I'll be rattling around England for the week prior to the meet, and in the German / Swiss border area afterwards, with a few days in Paris at the end.

"Open Jaw" travel is definitely the way.

Cheers