For those of you with a LO and a large dog, how does it work when you travel by car? Dog in the cargo space/trunk area... then where do you put all of your stuff? Dog on back seat beside car seat.... is this safe?

All of our family lives an hour away, so we make that drive a lot, and we take weekend trips to our cottage quite often (2.5 hours away). Right now we take our dog with us everywhere. She's 80lbs and super well-behaved in the car; she lies down on the back seat and doesn't make a peep. I'm just trying to figure out how this will work once we have a LO + gear on board. I know there will be times when pup just has to stay home for a day trip, but there will be plenty of weekend-long adventures where she'll be coming along!

In case it makes a difference, we are looking to replace my car (4 door sedan) with a crossover SUV (Mazda CX-5, Hyundai Santa Fe, something similar), and DH drives a pickup with bench seating for 3 in the back and in the front.