I sure wouldn't leave it for two weeks. I bet you'll come back to a real stinky trailer.
Drain and flush (fill) it out a couple of times and then leave a few gallons of fresh water in it.
Those chemicals are just basically deodorants...waste of money in my opinion.
Now if you put rid-x or something like that in there and leave it for two weeks, you will definitely have nothing but liquid when you get back......but the smell will still be there.
Ron
Ron & Sandie
2013 Tiffin Phaeton 42LH Cummins ISL 400hp
Toad: 2011 GMC Terrain SLT2
Tow Bar: Sterling AT
Toad Brakes: Unified by U.S. Gear
TPMS: Pressure Pro
Member of: GS, FMCA, Allegro
RETIRED!! How sweet it is....