If they offer a Subaru wagon - that is your ideal vehicle. Adequate trunk room and drives like a car.
A big fatal mistake is folks rent a bigger SUV and false impression on the road because they ride high and can't feel/see the road too well. Handling not ideal so they go faster and fault when lost of control or lose contact with the road. Unless the space is necessary - I strongly discourage folks rent SUV unless they are familiar driving them and understand the pros/cons (in bad weather conditions).
If you do decide to rent a SUV - go slower especially around turns vs. a car as it won't recover as well (unless you apply gas for traction = counter-intuitive) and won't stop nearly as quick as a car going downhill. If heavy winds you may want to follow the truck/bus ahead of you and just relax as speed won't win.