@SouthernHope :
The question I have is about your son, are you based on experience afraid that he will easily succumb to peer pressure and will go along with the crowd and do something stupid? Are the other boys that bad, when you say they aren’t angels, that is different then if they are a bad seed, so do you think they are likely to go wild and do something really bad? In the end, to me, it comes down to how much you trust him and his sense of self respect and such. One of the downsides of making a decision like this is you are basically telling him you don’t trust him and that can strain things, so I would be careful that you really, really feel like the situation at the beach house is a disaster waiting to happen before saying no. Are the boys that bad, and do you really think your son will simply go along with them if something does happen?
In the end, you know the situation better than anyone of us on here, and the answer is never cut and dried, if you really feel like the parents can’t supervise the boys right and/or your son will be led into doing something really stupid, then as a parent say no. I wouldn’t tell your son that you don’t trust the parents, and you don’t have to explain every little nuance of it, just tell him you don’t feel comfortable with a 16 year old going to the beach during spring break like that. If he asks about the S, she was older, and tell him a year makes a big difference, plus the circumstances were different. I would tell you that given the circumstances, it is likely your boy will be okay and will enjoy himself without getting into terrible trouble. One thing to keep in mind is that the parents likely will be more strict in a scenario like this, if for anything these days most parents who have half a brain realize that they could be liable for all kinds of heat if the kids in their care get into trouble, if the kids are found to be drinking at the house by the cops they could go to jail, and if something bad happened they could face other irate parents up to and including a lawsuit, so I would argue that they are likely to be a lot more vigilant then they might be at home.
If in the end you feel like he shouldn’t go, then you can tell him you don’t feel comfortable with it, that you think the combination of teenage boys and spring break is just too much risk for you, and leave it at that (don’t mention the parents being lax). You are the parent, and making unpopular decisions is part of that. Put it this way, as much as we trust our son, and we trust him a great deal (he went to a summer music program with kids much older when he was 11, which didn’t necessarily go as smoothly as we would wish, but didn’t damage him for life), there have been times when we have said no to things he really wanted to do, because we felt it wouldn’t be good for him, and while he could be upset about it, he also respected that. If you generally have shown him respect before this and haven’t been overbearing, he might be upset, but will understand it I think.