We thought it looked good too but we can't make that weekend, so we booked our own at Easter. Speedferries.com (£50 return), one night in Boulogne Ibis @cos the early ferries Good Friday are booked up (£50), 2 night in Best Western Compiegne (£90).
Total cost £190 ie £95 each for a three night break.
Unfortunately we do miss out on the cameraderie of like minded Mini nutters which is what will make the GoMini trip a lot of fun.
Have fun

just a shame Peanut has to work Bank Hol Sunday