legglady...
My son was 19 with shoulder length hair when I took him to DR...also, no tatoos, really good, clean cut kid!
Best solution was to have his hair braided with thick 'cornrows'...very practical for the beach, and he looked sooo cute!
He got so much attention from the girls at the resort...he wanted to go to the disco every night!!!
I suspect your son will have a lot of fun also! Even if he looks like this...<a href='http://www.smileycentral.com/?partner=ZSzeb008' target='_blank'><img src='http://smileys.smileycentral.com/cat/15/15_8_10.gif' border=0></a>
Tell him to learn the basic 'merengue' and 'bachata' steps from the 'animaci?n' team when they teach it, he'll do OK!
Just relax and enjoy your vacation! Everything is beautiful in the DR!<a href='http://www.smileycentral.com/?partner=ZSzeb008' target='_blank'><img src='http://smileys.smileycentral.com/cat/16/16_4_22.gif' border=0></a>