My future in-laws will be joining us at CSA in less than 2 weeks, for our weddingmoon. I provided them with links to look at on the website (activities, excursions, etc). I let them know what dinners we already have planned and let them know they can join us, if they'd like (except for our private dinner on the beach the night after the wedding, of course). I looked through the activities schedule and suggested one activity (basket weaving) that I thought my mother in law would love (but linked the schedule for her).
We have traveled together before, so we know we are compatible. We tend to plan get-togethers around meals or activities (snorkeling, cameraman cruise...etc). I really don't see us hanging out with them at the beach, pool, bar unless we just happen to run into them.
CSA - May 2012
CN - May 2013
CSS - October 2013