Well, i did many trips with various scooters, single and in pair, including two states away on 50 cc 2-stroke (I was younger then, obviously).
However, I find scooters to be slow and boring (never drove anything >500 cc), and on top of that they handle poorly, have the worst possible suspension and brakes.
I also DO NOT LIKE having anybody as a passenger behind me.
Combined, this means that I would not consider scooters for traveling, neither would motorcycles unless I am single up. If I had to drive with somebody else, or if I had to choose between scooter and a car, I would rather drive a car and enjoy the luxury of stereo, air conditioning, not caring about weather and boot for storage.
And this comes from a person that has been driving his scooter around the year for almost 15 years.
However, that`s just me. I want fun riding bikes and fun is nowhere to be found on a scooter with a thumper that has top speed of barely 140-150 km/h and suspension/brakes of a wheelbarrow, that is typically overloaded two up etc.