I don't have a tour operation, but I do have a couple of perfect domain names I would prefer to sell together, please contact the email address on the whois record if interested.
GlidedTour.com
GlidedTours.com
Also, a few others not directly related to tours:
golfsegway.com
segwaygolf.com
segclub.com
I'm an old timer from the beginning - theitquestion - last post Jan 2008, couldn't login on my old account so I created a new one. (formerly GyroGo - still first page of member list reputation points)