I have decided the family will be going Mr. Sanchos instead of the Dune Buggy excursion I have booked with RC in Cozumel. I am getting pretty tired of the cancel excursion/wait for refund process. So, I am thinking it to be smarter to just wait until we get onboard and cancel the RC excursion (which is scheduled for three days after boarding). I believe my plan would result in getting an OBC of the refund amount...which I would prefer to use to offset my sons' drinking bill anyway. Is there any problem with this plan?