Had a blast Fox Ridge Filth Ride last weekend South of Cedar Falls Iowa.
Lots of fun on varied terreign but none of it flat or paved. Went over the handlebars once when I rode into a sandbox.
lessons learned this ride:
1) wear shoes, not sandals for gravel events. My Big toe lost some flesh during a unplanned flip over the handlebars when said toe clipped my pedal cleat.
2) bigger, fatter tires are always needed. I had WTB 42 Resolute front and 44mm Byways back (Tubeless, 35-40psi). These were marginally OK for dry conditions. Wet conditions would have needed 2-inch minimum. I'd want clearance for 3-inch if needed.