I have a stock 03 GMC PU with a rear locker. Are there trails that it can run and may not break my daily driver?

I took my Raptor out there with a trail guide. There where plenty of trails to run it on. You should be fine and have a ton of fun in the process.

There are enough fun trails to run in a stock vehicle. Just be mindful of the signs telling you what the trail is and what can run it.

yesir but listen to those guys and be mindful of your surroundings