Edited... Husband's family (need advice)

Alright. My husband's side of the family, mom, brother & girlfriend want to move near us about 8 hours south (they're moving from Ohio to NC where we live). My family already lives near by, bc this is where I grew up. Though my husband has a wonderful relationship with my side, I, on the other hand, don't have an awesome relationship with his. I feel like they take advantage of him & haven't made any effort to support our marriage. We have a little one on the way, and I'm concerned their presence is going to damage our primary family bond that I'd like to create. I feel like the boundaries are going to be overstepped and it's basically going to be like them pretending like its 25 years ago and they're all back together again & im the 5th wheel. I want to know how many of you live near your inlaws and how do you balance immediate family time with extended family?