I'm thinking about a F350 dually. Tell me what you know.

Don't get one if you don't need one. Driving a dually is a PITA

It's a bitch to park and just not fun to drive. No way I would ever get a dually unless absolutely necessary.

Not if you have a pair of nuts. Get a dually. I almost went with a dually on my last super duty purchase.

Don't know yet. But when I upgrade from my travel trailer I will probably need one. My problem is that I will mostly be using it for around town stuff. Be towing a dozen times a year.

It's no wider than a F250's mirrors. If you need/want one, get one. That's all my dad buys and hasn't pulled a trailer that a mini truck could pull in a decade.

My dad got rid of his dually for a '16 GMC 3500 HD Z71. He had the dually to pull his 45' 5th wheel.
He got rid of the dually because the ride when not pulling sucked and wasn't worth it. He has the camper for work so he would pull it every few months from job to job across the state. He said he sees no difference in the HD than the dually towing and the day to day ride is much better.
IMO, unless you tow something big big and frequently, you may be happier without the dually.

Should be fine with 3/4 ton unless you're buying huge 5th wheel. Good luck with POS power stroke

I drove a dually for years and loved it. But then again, I have a sack of nuts and skint up knuckles.

Have a 250 gasser now. Can't imagine anything could be worse on mileage than it is.

I have a 3/4 ton diesel with air bags and the BW rollover 5th wheel/gooseneck.

It pulls my 5th wheel great. The only thing a dually would be really needed for is if you are pulling a big, heavy toy hauler with a lot of pin weight.