I'm gay but my best bud is straight

And he's leaving Friday on a trip for 10 days overseas and this is the first time we won't see each other almost every day since we became close. He's known about me from the start and its cool. But when I see him tomorrow night I feel like he'd feel awkward with a hug when I tell him ima miss him so the question is: would a fist bump followed by a hand grip be considered a cool bro goodbye? I know it sounds lame but it's important to me. Thanks.