Playa del Carmen is nice, but have fallen in love with the Osa Peninsula, Costa Rica.
Heaven on earth.
http://www.bosquedelcabo.com/home/index.html
My son and his friend and I are going to Canada a couple of time this year with the motor home and boat. 2nd trip my dad is coming with. A couple of other motor home trips with the wife and daughter and son to who knows where. Any suggestions that are within 700 miles of Chicago? Daughter is 9 son is 15.