Moving- what car ride with chins

Hi all, so we are making a huge move from california to idaho in a few months. Itll either be a 3 day trip with one night in a hotel or a 2 day trip straight shooting it. The current carrier my chins have is really small and i dont want them to be in that carrier for 2-3 days. Fitting 2 of them and a food bowl with chews would be very tight. I was planning on putting them in one level of their cage during stops to let them stretch out, but im concerned if i just leave them in the car someone...

Moving- what car ride with chins