To Trailer or Not to Trailer?

[Carol]

MOE is considering buying a trailer to help transport the robot and other necessary equipment to competitions (especially off-season, when less people attend) and to demonstrations and community events. (We can then, of course, paint the trailer with our colors and dazzle people going down the highway). We have been using mentor's pickups and vans for transport, especially to Atlanta, as we generally either fly or drive to the competitions.

Does your team have a trailer? Some questions:

What kind do you have?
How often do you use it?
Where do you store it?
Who pulls it? How many mentors/parents are able and willing to pull the trailer?
What are the annual maintenance costs?
How do you manage who is authorized to pull the trailer?
Do you have training sessions for authorized operators?
Do you find the trailer more or less convenient than a pickup truck or van?
Do you have insurance for it? How much does it cost?

Since we are not affiliated with a school, we have to organize and pay for our own transportation and the insurance that requires.

All advice is appreciated!