Car question

I have a new Chevy Tahoe. We weren’t planning on anymore kids and surprise #3 is on the way. My question is we have a bench seat in the middle, a lot of people have said bucket seats are better and easier for kids to walk to the back. Just curious if you have any opinions on this situation?! Not sure the three car seats will fit across the middle seat according to car seat guidelines so our oldest would have to go in the far back and we leave a seat folded down ?! Any advise?