Travis - I have been looking into gold prospecting as a little adventure for me and my older boy (6 year old). I have a few thoughts.
1) If you want to do some serious prospecting, you might want to invest in a small sluice. Looks like from your photos you have plenty of water to work with.
You can process MUCH more material much more quickly, which will make your prospecting efforts faster and more reliable. You can wash a bucket of sediment in a matter of minutes and then use your pan at the very end.
2) Hard rock mining is a much more challenging proposition than processing alluvial deposits, requiring a very different set of tools. You may have stuff on site already to handle that, but if not then prospecting for alluvial deposits will be a cheaper and easier way to start.
3) Have you looked at videos of people working crevices in the bedrock? Gold settles to the very bottom of the sediment, being the most dense. It is highly unlikely to be found in course river washed gravels.
Good luc, and keep us updated