One length should be plenty. Someone told me the reason the sewer was stubbed up was to keep snow melt from running into the sewer system. I hooked up my sewer hose when I was there, but kept the gray and blackwater valves closed. When my gray tank was full, I dumped it and then just walked the hose to empty the hose, then closed it again. I dumped black water at the dump station which is right across from the office where you check in.... Figure 6 -7 days from Davie.......Enjoy your trip.
2002 Jayco Eagle 300FSS Travel Trailer, 2005 Chevy 2500HD Crew Cab 4X4 w/Duramax, RDS 60 Gallon Toolbx/Tank Combo, Edge EZ, Boost Stick, Bilstein Shocks, Michelin 265 MS2, Isspro Pyrometer and Boost Gauges, ARE Topper, Honda EU3000