I used the bumper supports (two on each side) and additionally welded them to the bumpers. Then I rewelded the existing bumper welds to reinforce them.
If you don't own a welder, this is not a very expensive thing to have done.
The brand-name bumper supports are expensive and slightly thicker but the generics, which you can find online, are half the price and you can get two for the price of one. This way, you can put two on each side for the same cost. Also, you can usually buy them used on Amazon at a greatly reduced price. They're not actually used, just ones that were returned. Since they're solid metal, they are safe to purchase "used".
Another point:
If you purchase any of the bolt-on bike hitches DO NOT use the bolts that come with it. Instead, replace them with
Grade 8 bolts that you can buy at Home Depot or Lowes.
The hitches themselves are made well but the bolts they use are inferior and will break. If you replace them with Grade 8 bolts, that won't happen.