Even though I don't have/don't ever expect to have a dually, do the swing out brackets make it easier to load a camper? Other than the $200 cost are there any downsides?
If you have more than 3/4" of clearance outside, then the dually brackets won't gain you anything. You still have to thread the camper in between the wheel wells, and there is only about 3/4" of clearance on each side there.
Judging by my setup you should have 2-4" of clearance on each side with a SRW pickup as a general rule. If you miss that you're definitely putting a dent in the wheel well with the camper.