I have the Prodigy P3 and its fantastic. You don't have to do anything it really is plug and play, plus they have really good videos to help you learn how to use it.
The sway bars are NICE but not required.
I HIGHLY recomend that you have your battery checked and evaluated before you tow. Specifically tell them you are pulling a trailer, and it will be drained excessivly, and you want to make sure that its hardy enough to handle it. There is nothing worse than packing every body up, you're on the road you stop and then the truck wont start b/c your battery was too weak too support the truck *and* the trailer.
ALSO, when they're doing the install make sure that they verify the wiring, supports the 7th channel for the 12 volt to the trailer. OTHERWISE the secondary lights wont work. (Secondary lights are things like, interior trailer lights, dressing room lights, exterior loading flood lights etc. Anything thats not the break or turning lights).
If you have a spare $600 laying around, get something like this to remind other drivers what you're towing.
In my own opinion, something like that is far more helpful than sway bars. I trailer warmblood moms and babies, hundreds of miles every summer. I hauled 2,500 miles last summer, over mountain passes and across deserts, and I've never been in a situation where I thought sway bars would help one way or another, but every time I pull out of my driveway with a horse I wish to God that I had that graphic, picturing one of my foals just to remind people I'm not going slow to annoy them, and I need 100 feet in front of me to stop "b/c I have a baby onboard, so I would appreciate it if you didn't cut me off in your Mazda Miata, causing me to slam on my breaks and throw my horses around.
Anything to get other drivers to help me out, is far more helpful that sway bars any day of the year.