My Coach man Catalina has been stationary this past year and plan on using it at my maintenance shop.my problem is my waste tank was full and had not been emptied for a while so i called my local sept...
I don't think I'd use anything but the wand while it is getting pumped out. Definitely not a paint mixer on a drill. You could damage or knock loose sensors or slip and crack the tank in an extreme case of bad luck. Time is really all you need.