A road trip for the ages!

The Zolciak-Biermann family is hitting the road and traveling cross-country when Don't Be Tardy premieres tomorrow night (Oct. 6) on Bravo and it's going to be a wild ride, according to Kim Zolciak and Kroy Biermann's daughters Brielle Biermann and Ariana Biermann. "Nine people: six kids, our parents, and the nanny. We traveled across the country 40 days and 40 nights. Longest 40 days, 40 nights of my life," Brielle tells E! News exclusively. "Thank God I had Ariana." "Thank God, because if I did not have you and we were doing that alone, it wouldn't have worked," Ariana echoes. As fans can imagine, things were a little cramped aboard the R.V.