Any twin moms trying for or have had a VBAC?

I'm 31 weeks and just found out that both babies are head down.  Dr. Says if they stay this way there is a good chance of a vaginal birth.  That would be great but I am also worried how this will go with my twins.  My uterus is already really stretched carrying them and I know one can flip still but I'm wondering if anyone else has actually had a VBAC with twins?