For future reference, here is a URL that will take you to collection of links to the various rack system & sports trailer providers who offer tandem products:
http://home.att.net/~thetandemlink/T...l#anchor810905
My .02 on the BEST way to haul tandems:
1. Inside the back of a Suburban or Van, out of the weather and secure.
2. Inside the back of a SUV or mini-van: same as above but a little less room.
3. Pick-up Truck bed, with or without camper shell.
4. Roof mounted systems for cars/vehicles where it is practical.
a) Surburbans - three cross bars and single bike mounts can be used to haul up to four tandems up top.
a) ATOC Tandem Topper is the original swivel-head design and they offer models that work with tandems, triplets and quads.
b) Tandems East tandem mount. Good product, not too expensive.
c) Rocky-Mounts tandem mount. Good product, not too expensive.
d) Yakima's OLD tandem mount. Not fancy, but a good design.
e) Yakima's new Sidewinder. Over-engineered and aesthetically challenged, but a good solid product.
5. Draftmaster. A great idea, well-built and relatively easy to use. However, can be a pain to gain access to rear doors of SUV/mini-vans while it's installed, requires some storage space when not in use, i.e., awkward to drive around with and poses limitations for vehicles parked in garages.
6. Rear trunk-mount carriers - Cheap, easy to use but also presents the highest risk of causing cosmetic and/or real damage to cars and bikes if care is not used in mounting the rack and, in turn, bikes to the rack.
7. Howling Dog / Sportsrig Trailers. Very cool and perfect for hauling stuff around that just can't go on the roof, inside or on back of your vehicle. Cons are storage requirements, added burden of driving around with a trailer, and loss of ready access to systems like 1, 2, 3, 4 & 6 which can always be there when you need them.
Bottom Line: There is no single best solution or system so you pick and choose from any one of these good systems to find the right one for your needs and limitations.