I have been on lots (mind you its a great place, very popular & so these are repeat visits to the same retreat) I can highly recommend them - I always go prepared with at least 4 projects (UFO's) or stuff cut & ready to sew for my few days away.
Don't waste precious retreat time measuring & reading patterns to cut blocks out while youre there - often too hard if space is at a premium, plus easy to become distracted. But - its great to have others to bounce ideas off, check out their current projects; relax & be pampered with yummy meals prepared for us, catch up with friends from the last one - & such a great feeling to be unpacking at home, things finished that have been sitting in a pattern box/project box here at home for months.
Have fun !!