They are not in business with the WTS but they have employed ex COs and DOs as travel guides, Ruben Kobos for one. Their trips are quite pricy and I don't think there is any guarantee that all the people in your travel group will be baptized jws in "good standing." The ones on my trip got so bombed on the plane they threw up in the aisle...relatives of the owner at the time Dave Sopiwnik.
We took a trip to Bethel some years ago with another agent...much cheaper.