"I don't want just a hookup though"

And yet you wanna use a hookup app.

YES, GRINDR IS HOOKUP APP, TURN OFF YOUR INNER-DENIALS RIGHT NOW, THANK YOU.

Also, you're only going to be somewhere for one day and you wanna use it to find a BF? Especially one that isn't a hookup? Sorry but you are NOT thinking this through. Will one single day be nearly enough to properly get to know a person and decide they're worth pursuing? And what's the plan afterward, you gonna expect him to follow you home or handle the insanity that is a long-distance relationship?

Dude, stop thinking like this. You're going to the wedding of a dear friend and relative, the most important day of their life. Focus on that, make it extra special for them with your presence and smiles and laughs. And TBH it sounds like you're being a little selfish here, "Someone's getting married but I wanna make this about me getting laid" (facepalm)