Ran struts on the salt in '71, about shook my kidneys out.
Went back to a much smoother salt in '72 with shocks, MIGHT have snuck by with the struts with the better conditions but shocks sure made for a much better ride.
From what I have seen: I'll never try a bike at Maxton with out supension on rear even though I've seen ridgeds there. Loring is much smoother but anything I get going to run there would have some suspension on the rear.
Haven't seen any other LSR venues yet so can't offer valid coments on them.
Mileage for those with a younger body may vary