I can tell you one thing, when fishing in a PA creek you quickly know which pool has a palomino in it! It's the one with 50 guys standing around it all getting tangled up!
You're right about that. I used to fish the South Branch of the Potomac in WV fairly often. Some people would drive the road adjacent to the stream looking for golden trout then jump out and start fishing when they saw one. I gave up on trying to catch them out of public streams. Within a few hours of being stocked they'd either been caught or seen every lure/bait known to man.
The one you caught sounds like it was very nice, I've always wondered if they'd gain more natural looking colors like other trout that survive in the wild for a long time do.