I'm not going to include my future in-laws in my wedding party.
Is there a reason you don't want your future in laws in the wedding party?
I just don't like them, and I don't want to have to interact that much.
Congratulations on your upcoming wedding! Try to find a way to enjoy your day while still including your in laws. If you don't include them, you will be causing more problems with your new marriage.
My new husband won't understand if I don't include my in laws.
It's a bad idea to get off on a bad foot with your husband's family right from your wedding day, and you've said your husband won't understand. Give them a small role and let your husband have most of the interaction to keep everyone happy.