My advice if you go dual cam from Reese is to consider the new HP dual-cam unit. I have the dual-cam which works great. Dependent upon the trailer, you may have to mount the U bolts in the area of the gas bottles. In my '01 Safari this required the bolts to be under the gas bottles.
The new HP dual-cam eliminates these U bolts. BTW, I am very happy with the dual-cam unit. I also join the ranks of those who recommend it. Here is a link to a page where you can compare the standard and the new HP models.
http://www.reese-hitches.com/sway_controls.htm#Dual Cam
Regards,
Jack