If you are following the church teachings then you already no what is wrong. As for being grown up enough to control your self while traveling get two rooms travel with others to be safe. Yet , I have myself traveled with guys and we have due to lack of money gotten one room and 2 beds but in the end those guys are just very good friends with me at the time they were more than that but very respectful. making out is alright as long as you don't get too hot . I kissing is not at all a bad thing but you both need to talk about this stuff before engaging in it . Communicate with each other, take your time with with each other as well. Just my 2 cents.
Well frankly isn't temptation a state of mind?
For example if I'm going camping and sharing a tent with someone I'm dating. Say this tent is really big. We are both sleeping on the extreme opposite sides. What if there is not lust or mental temptation. It's literally sleeping in a tent. Would you consider that bad? Also I travel often and with one of my good guy friends. We typically to save costs get double beds. We are not attracted to eachother and we practically consider eachother family (as in sibling relationship). Is that considered bad?