Since your absences are only a couple of weeks, don't worry to much about it. When you come back to it and open it up; 1) if its dry and warm/hot, it will dry out quickly and any mold (if any started in a short couple week time) will dry and die off. 2) if it becomes wet and rainy, then consider it natures wash job since the awning is open. 3) finally, there are products out there which will not break the pocket book that are designed for cleaning awnings. (you mention you boondock camp, but since you leave the TT is set up all the time, you must have a water source.) Give it a couple cleanings throughout the season, and/or a good thorough cleaning before you close it up for the winter.
2015 White Hawk 25BHS Glacier Package
2004 Dodge Ram 2500, 5.7 Hemi, 5Spd Manual
2008 Arctic Cat M1000 SnoPro
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