Hello Josh,
The issue could be related to the excessive image overlap if every camera is overlapping with almost any other. You can limit the number of evaluated pairs of the dense cloud filtering process, however.
Go to Tools Menu -> Preferences dialog -> Advanced tab -> Tweaks button, then in the opened dialog create the new parameter named main/dense_cloud_max_neighbors and set it value to 55, for example. Then re-start the dense cloud generation (if you have saved the depth maps, you can re-use them to save the processing time).