What a diesel pusher is
A Class A motorhome is built on a bus-style chassis with a flat front and a huge windshield. A diesel pusher puts the diesel engine in the rear, which keeps the cab quieter and usually brings air-leveling suspension, big storage bays and strong towing capacity.
Inside you will typically find residential-style kitchens, full bathrooms or a bath and a half, and multiple slide-outs that open into a large living space.
Driving one in the mountains
Diesel pushers have the torque for long climbs, and most have an exhaust brake or engine brake to help control speed on descents. Use it, and pick lower gears early on long downgrades.
These are long, heavy and tall vehicles. Plan fuel stops with room for a big rig, watch height clearances and give yourself extra stopping distance.
Bringing a car along
Many people tow a small car behind a Class A, called a toad, so they can leave the motorhome set up at camp. Ask the owner whether the motorhome has a tow hitch and what towing setup they allow.