I come from a family that tends to be very "redneck"ish. They wear jeans, tees, and no shoes to EVERYTHING.
My cousin is getting married 4 months before me, and they're having a very casual backyard wedding.
My wedding, on the other hand is in a church & I want them to wear something more formal. I understand that my wording should be "semi-formal", because I would like the guys to wear a suit & tie and girls to wear dresses or skirt/blouse. Everyone also has to wear shoes. I'm afraid if I put "semi-formal" on the invitation, my family would stretch the "semi" and be relaxed on the "formal". In other words, wear the same things they normally would.
How should I word the invitation differently or get it across to them that I want them to dress their absolute best?
I also had the idea of getting a ton of really cheap flip flops for the reception, so they can kick of their dress shoes & throw on flip flops for dancing.