roof rack?

I'm still in the search mode for my first TM. My first thought was a 2619 but on further invesigation I'm looking for a 2720 instead. Can anyone tell me if it's possible to mount a roof rack to carry a kayak on top? With or without the rack I'm so looking forward to finding our own TM. We've got a wedding to attend in Colorado Springs in July, sounds like a great first trip to me.
Thanks,
Bruce