Hog III Rackmount w/ DMX Widget

I'm working on a themepark project that will require a Hog 3. However, I will only need 2 universes of DMX. Can I use the rackmount Hog 3, and just connect 2 DMX widgets, or do I also need a DP 2000?
Or should I save money and get a rackmount PC with Hog3 PC, and 2 widgets?