Ok , I have lived in the South most of my life and I even had a job once cleaning up mold in houses. Use a mixture of 1/4 Clorox and 3/4 water and one tsp dishwashing liquid in a spray bottle. 1. remove everything inside, 2 wear clothes that can get bleached, 3. wear gloves and a protective mask and goggles. 4. pour some on the top where it can leak in over a couple of hours.(days) 5. on the inside use a brush and spray down the area of the mold, spray it down and scrub three times. use old towels to wipe down after each spray scrub , 6. Let dry, use a fan on it over night,two or three days, get it very dry, very dry. &. Spray everything down with Lysol. spray down , sides the floor ect. if you had a mattress be sure to spray it down too and wash it down with the Clorox mixture if it got wet, let dry then spray with Lysol Seal the leak and enjoy your summer camping .
Mary C.