Interesting post...but I would imagine that for a price it could be done. Check with some of the folks that do massages for a living and ask them if your request is possible. I would make it clear that you are not expecting a "happy ending" ....just a massage in the buff. Generally, they only cover vital areas anyway, so not placing a towel over an area couldn't be that much of reach ....for a price. It is Negril and most every likkle ting is negotiable.I would definitely use those extra towels to lay on the sand however...LOL
Good luck!