I'd like to second what others have a said here and add in a few thoughts of my own.
I'd like you to think about how critical storage is to you so you can shop with that in mind.
Also, small wheels vs large wheels (e.g., 10" vs 16") will be less stable but will give you a much wider selection in tires. 10" wheels will give you very quick handling almost to the point of being twitchy. While this is fine for commuting, it's going to make holding a line as you go through the mountains much more difficult, especially as you go over bumps.
Be sure to get at least a 150cc scooter othewise you'll not be allowed on limited access highways.
I'm also going to recommend a larger engine (200cc or above) if you're going to driving in higher speed areas. You can likely reach the speeds you want to with a smaller engine, but you're really going to be taxing the engine.