My question would be what weight rod for whites, line and tippet, and what type of flies would you use for the white bass run? I would appreciate any help.

I haven’t been to the Colorado in over 5 years. I would go Colorado Bend state park and a 5 wt and it would work for me but I would always want more distance and ability to throw heavier flies. I don’t think you need the backbone of a 6 for fighting power, just the ability to shoot out a heavy clouser.

All colors of clousers work out there.

That's a loaded question and there is a lot to consider. What else lives there and how big and deep are they. As far as flies clousers are easy to tie and catch most anything. I don't fish that area and mainly fish lakes.
My home lake go to is 7wt, floating line bass taper head and weighted fly if they are 0 - 10'. Deeper I would use sinking line or tip. In this scenario striper would be below scarfing up the pieces of baitfish the whites are plowing through, that's how they get big eating like kings expending little energy. If I fish Whitney 8wt or 9wt because of the striper,
As far as whites 5 wt would work but what else is coming to dinner. Since you are targeting a river I'd go with 6wt or 7wt floating line and a box of clousers or any shad imitation. Good luck.

Thank you very much. My kids bought a combo from Cabelas a 6wt prestige. The depth at the Colorado would mainly be 4 ft to 10 max.

Thank you for all the help I actually caught some rainbow today in Nolan creek at Belton. Today was a great day caught my first fish on fly rod. Going to a seminar second week of January in Roundrock. Thanks again.

Scotty Bob you seem to be in my neck of the woods. Shoot me a PM and I can help you out. If your new to this type of fishing I have tons of flies and stuff.

I'd take bones up on the offer. Local knowledge and experience is priceless. If nothing else make a few flies and try them out. Made these last year and worked well in the creeks. Didn't have to tie on more than one.