E.J.
I just had to do this in our Chevy Impala and it was a very tight fit. My van was in the shop for a couple of days. I put the two bulky seat on the side doors and the booster seat without a back in the middle. My kids thought it was fun at first until I was getting frustrated making sure everyone was in right. Than they were all so close that they started to fight about space. "I am sure if other people can do it we can too." said my husband but he didn't have to listen to the kids arguing about space between my 5 yr and 3 yr and my 2 yr just cried.
Good LUck!