He doesn't want to go camping with me!!

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So my boyfriend is allowed to go on our family camping trip. There will be a boy tent and a girl tent. My whole family is going as we do every summer. I figured he'd want his own tent so he's not sleeping with people he doesn't know. His parents said he can come but they want mine to call them to tell them the details. After he found out we won't be sleeping in the same tent he got all weird about wanting to go. He finally agreed this morning but when I asked when he wants my step mom to call his parents he said never and has been pretty pissy since. He's acting like a total ass which is not like him. I don't know what to do help!