Should I get Weight Distribution, Sway Control or Both

You definitely need a wd hitch at minimum. You will exceed the trucks receiver rating without one. Some sort of sway control would be advisable too. A properly loaded tt shouldn't sway, but it can be hard to achieve that. A wd hitch with built in sway control such as the Equil-I-zer, Reese dual cam or Blue or would suit well.