Like Ouray I have found 1"-2" tube jigs effective for smaller trout, and think the bigger tubes would work for bigger fish - hope to sample some big trout water this summer. Some good things about tube jigging:
1. A single hook often does less damage to a released fish than trebles, and is less likely to snag.
2. When you snag & break one off its not as costly as a hard lure.
3. An arsenal of colors & sizes doesn't take up much space.
4. Jigs offer angler control - quick drop into deep pools, shallow over rocks & ridges, etc. A tube jig can even be bounced off rocks on the cast.
I got some tubes on eBay from "thesportsmaster23" with Berkley Power scent, salt, eyes, and realistic dark back / pearl belly colors that are the best lures I have ever used.