One of the main drawback of distance races is the cost and manpower of the support teams. One of the advantages of races like the steeplchase is the you eliminate those costs. It looks like most of the raids that are becomming so popular are also setup so to eliminate those costs. The other thing that seems to attract people is warm water warm weather. We have the florida keys. Run the race in the same time frame that the Tybee was run but start and end in the keys. Maybe 25/35 mile legs. Two legs most days and maybe 3 short legs on one day. Total 5 days. You could run some great courses on the bay side back thru the islands on the Florida bay. Start in Ley Largo end in Key Largo. Both Ocean side and Bay side with a lap around Key West. By having shorter legs and multiple legs each day you keep the racing tighter. Scoring done on low points so you don't have to worry about keeping time.