Hey Jacob I was born, raised, and still live in Redding. I just bought my first metal detector, and have barely used it, so giving you tips on where to go is not with in my ability yet, but would love to help you discover some, and even go out hunting with you if you don't mind company.
A few areas I have been looking for info on would be the river crossing on Balls Ferry road south of us. Used to be an actual ferry crossing there somewhere, with a few houses, and an inn from what I have read, I am thinking it is private property now, so would have to find a promising site, and get permission.
The diestelhorst bridge area. In south Redding.
Of course anything leading to a location where Ruggles brother hid their loot, but I honestly think it is long gone.
Rumors of mormon gold lost in clear creek when the creek flooded and flipped one of their wagons back in the late 1800's. Again most likely BS, or long gone, but who knows.
A guy in cottonwood had a lead on a place just out of Red Bluff that was a high end resort in the early 1900's, but the current owner refused me permission to go on the property.
There is history in this area from the 1880's 1890's time period as far as I know, but I am finding it hard to narrow down any particular area to hunt.
Of course being brand new to the hobby, getting off my butt and hitting some parks would probablly be my best bet right now.