All passengers must ride crated unless there are specific instructions to the contrary.
If you don't currently have any crates, you can find them cheap/free on CraigsList, www.freecycle.org or local thrift shops/garage sales. All crates must be wire/metal or plastic. Soft-sided crates are not allowed on our transports.
If a shelter is sending cats or kittens to rescue, they will send them in a crate that goes with the cat all the way to rescue. Drivers just transfer the crate from vehicle to vehicle.
All passengers must ride in the climate-controlled portion of your vehicle. That means if you have a pickup truck, nobody rides in the bed.