I have just done both with the same trailers so giving information on what is done and what I have done. But telling someone that a SRW is fine with a big toy hauler, be realistic. I am close to max on my dually but see people tow trailers like mine with a SRW all the time. Is it right, I don't think so, so when asked a question like this I give my experience. I don't understand why a person that can defend the choice of SRW can't take the fact that some people will defend the choice of a DRW. Pin weight yes, but having a SRW you are limited by tires. Even if they are 3800 per tire, that is 7600. Now even if mine are only 3000, I am at 12000#. Little of a different in my eyes.
I know most that defend the SRW wont look at this:
http://www.ford.com/trucks/superduty/specifications/towing/
I gained what 5000 on Conventional towing and 10000 on fiver.
So saying you can tow close to this with a halfton for example is wrong.
SRW F350 - 15700# Fiver and 14000# Conventional.
Now tell me again how I am wrong to recommend why someone should get a dually when towing.
F150
http://www.ford.com/trucks/f150/specifications/payload/
Max fiver I saw was 10,800#. I would never do that. Max payload in the 3000# range. Means the truck weighs only 4000#. Yea ok. This is my point why recommend a 2 oz hammer when you need a 10 oz sledge?
My first personal fiver with a pin weight at 1800 and unloaded was 8000 IIRC and was 26' long would be too heavy for this truck. Guess what it is not called half ton towable. That trailer would destroy the truck on anything but down hill.