My family is a biker famliy. how do i tell them i don't want their friends at my wedding?

my dad was a outlaw in central Florida until he died two years ago in a motorcycle accident(still not sure if it really was an accident) and my uncle has ties to the hells angles. I've grew up around bikers but i always feel kinda scared. i'm not like them i'm not into all that. i don't want to feel uncomfortable at my own wedding. i mean don't get me wrong i like drinking and tattoos but they always take it way too far. anyway they kinda expect me to invite all these people that i don't want there. i'm not paying for it my mom and aunt and uncle are. my fiancee feels the same way. we are just normal. i want to get away from that part of my life and settle down start a family. i just don't know how to tell me family i just want a normal wedding without fear that somebody is gonna stab somebody or get shot and i'm not to happy with the idea that there are gonna be a ton of drugs there. i can't do it anymore. what do i do?