"...they would probably think we are aholes..."

Honey, don't worry about them thinking you are an a-holes. Without even knowing you they already call you evil,  wicked and controlled by the devil. Doing the "right" thing won't count for beans in changing their Watchtower-authorized opinion of you. If the Watchtower Society says you are evil, you must be.

People like you--like us--are specifically UNINVITED to wedding receptions of their closest families because Jehovah's Witnesses are not allowed to eat with "sinners". (Jesus didn't have any problem with this, but the oh-so "righteous" JWs get shunned for doing that.)

BTW: No wedding invitation = no response necessasry.

If I had it to do, I'd plan to have fun with people whose company I enjoy rather than be treated rudely by people who'd have no problem publicly asking you to leave the reception.