The ONLY time I ever had that problem was when I loaded up ISBB's heavy a$$ Samurai in my hauler to go down to Havasu. I loaded up a golf cart, then the Samurai and had a little sway problem on a road going there. Then again you have to expect that if you load your trailer wrong. :gayboy: With 2800 lbs BEHIND the axles you will get that.
Since then I have never had a problem with "the tail wagging the dog". I even load up a Raptor, then the sandrail, THEN another quad behind the sandrail and don't ever get any sway. I don't even have any sway control setup on mine at all either. I am guessing the reason I don't get any sway could be because my truck though. I have a crew cab longbed, 18" wheels w/ E rated tires (less sidewall flex than most tires), and the trailer has quite a bit of tongue weight as well. You can get sway with a 5th wheel too though. (Ask Rhino King :ahhhhh: ) Just remember to load your trailer properly and not to put too much weight behind the axles and you'll be just fine. If you are really worried about it I heard the dual cam sway control setup from Reese is good piece of mind. I haven't gotten any white knuckles towing my trailer yet so I haven't forked out the couple hundred $$ for one.
FYI: I doubt you'd be able to turn any toyhauler around in a cul-de-sac unless the trailer is really small and there are no cars parked on the curb.
Good luck with your purchase. Hope I have been of some help.