Hi weestrom05, I have never used a holding tank and have had no problems so far. Just be wise when and where you dump.<br><br>Edit: What I like about this set up, is when I am in stealth mode I can discharge all grey water very discreetly at my chosen sleeping spot. I will generate grey water through out the night (especially morning time) and this allows me to rid it immediately. Usually I come and go under the cover of darkness so detection hasn't be an issue.<br><br>A funnel would be a good idea or a bucket with a flexible drain hose when dumping. I built a bucket sink (picture below) but I don't use it, it takes up valuable space and is a hassle. After a few accidents (lesson learned with smells) I just take my time when dumping.