nc-basinger's Identifications

Running Crab Spider - Philodromus species (female, ~4mm, with nest and spiderlings)
Dr. Mark Basinger, another participant on the trip, identified this. (I concur--this is my first!)
Species ID from photos seems to be very difficult, so I'll leave it at genus.
Also posted at: https://bugguide.net/node/view/2369500
References

• BugGuide (genus) https://bugguide.net/node/view/6823
• Rose, Spiders of North America (Princeton Univ. Press, 2022), pp. 460-7 (genus)