They said it's not "logical" to attempt travel with two cats. Like there's a law there...
I swear, sometimes I think I'm the only human in a family of Vulcans.
Morning Rosie. re cats & cars. We've been traveling with ours for years.
Our first had a half dozen states under his belt by the time he was three. More recently we've taken two cats on numerous jaunts to Colorado.
Each had her own kitty carrier, we faced them together so they could see each other. We opened the gates and pushed the two together once when we are on the road. They then both snuggled up in one.
Rest stops were appreciated and we had the litter box on the floor.
Ours traveled well, there is good chance yours will as well.
For the entire trip out to CO, there will be one of you available to tend to the cats if need be. It's not like you'll be driving alone, and have to stop if there's a problem.