The only way we can do 3 BBG's back to back to back while riding a 100CCC is to not stop in San Diego when we finish our first 50CC. We will have to get our rest after the first BBG is completed at Van Horn, TX and then we continue to ride to San Diego get our time and date stamped receipt to end the first 50CC and start the second 50CC ( we will lose all of the time between the first and second 50CC's that we would have used for rest ) and then continue and ride to Las Cruses, NM to end the second BBG. We can rest there for a couple hours depending on how much time we have before the clock starts for the third BBG. We then start the third BBG at Las Cruses, NM which will end at Monticello, FL. We can get some rest at this stop which is the end of the third BBG depending on how much time we have left on the clock for the second 50CC. Either way we still have to ride another 167 miles back to Jacksonville Beach to end the second 50CC and the 100CCC before the 50 hours allotted for the second 50CC.
The only times you can rest is at the end of BBG's, not the normal places of Junction, TX and San Diego.
I have a pretty aggressive route for the first 50CC and do not plan much rest between the first and second BBG's at Van Horn.