Even though you are going to use a tower, I would put 2 horizontal poles across the tower, using "Cross" brackets. About 5 feet height between the upper and lower one. Then install a 4 inch pipe vertical on the 2 poles using "cross" brackets. Mount the dish to this 4 inch pipe.
This puts the wind load and torque on the tower across 2 tower legs, instead of it trying to twist one of them.
I would then run a small pipe/piece of electrical conduit from the outer edge of the dish (Usually bolt holes there), back to the third leg of the tower. This will then eliminate any wind twist of the dish (But will not eliminate any twist of the actual tower)
We have had medium size dishes actually twist off a tower leg, when they were mounted on just one leg !