I wouldn't go any lighter than 6# test. I run 10# on mine and just change the tippet as necessary. Stay shallow at 11 Mile, less than 15 FOW, sometimes less than 10 FOW. If you work two rods (need a 2nd rod stamp) be sure to work one low and another a couple feet below the ice. I've found a lot of fish high this year both at 11 Mile and Antero.
Also, there's no live baitfish allowed above 7,00' (or 7,500') in Colorado east of the Continental Divide. Don't want to see you getting burned by the Fish and Feather folk. I can't remember the exact elevation because I never use live baitfish.
Good luck and have a great trip.