Find a Guide that fishes Spring Creeks/ Private land. Very technical fishing in Spring Creeks out west. Find a Guide with recommendations from a lot of clients. No, you wont find fish the size of those in New Zealand, but you'd be surprised what swims in many of those rivers. If the Guide or Shop has been in business for a long time they are usually legit and offer good services. You could fish in the park without a guide, just a license and your own equipment. You could fish for Golden Trout native to California and Brook trout .Add these to your "bucket list". I think you'll find enough of a challenge fishing there. It's fishing just have fun and enjoy one of our natural Wonders, Yosemite National Park.
Take plenty of pictures and post a report when you get home.
The trouble with some people is that when their not drunk their sober. Yeates,