Note the rates plus a 15 percent resort fee for the paying guest. In reality anyone sleeping/staying at Oil Nut Bay is paying greater than the amount asked for day trippers.
http://www.oilnutbay.com/stay-with-us/packages/At times Little Dix and Peter Island have listed "resort fees". We have never been asked to pay those with advanced confirmed reservations for dinner or lunch. Same with the old Biras Creek. During the busiest times reservations for dinner or lunch may not always be welcome.