As much as the camp might have been useful for whatever reason before, if it isn't mandatory you attend I'd suggest dropping the camp,maybe find a new one.. if nothing else works out
I get people not liking gays and the side eyes and comments are one thing but if even another gay is spreading shit about you and you said it was getting to be more than just verbal? if people don't want to become more openminded there's not much you can do, especially if you've already gone to higher ups and nothings effectively been done. in movies the underdog is praised for toughing it out and how because he waited until the right moment one day suddenly everyone stopped harrasing him and wanted to be his friend.. but in real life if these people are picking on yyouand the authorities communicated the message to them that they can get awaywithit, with out legitimate reprecussion.. it's training them to think it's okay and they won't stop. so you pretty much can either suffer through it , and do your best to ignore it, or transfer. for some types of bullying it only lasts until they can't get a reaction out of you anymore but this isn't that type :(