Don't forget that water ballast is available if you land near the glider.

Considering the amount of crappy Moriarty water I've run through those ballast bags over the last 15 years, never flushing them out or disinfecting them, I would think twice about drinking out of those toilets. A water purifying straw from Mioxx or Lifestraw will definitely be part of the kit. Or a decent sized bottle of Jack Daniel's.