Same problem here. I drilled a hole in the back corner of the AC unit (very difficult to do without also drilling the coils inside - use one of those devices that will prevent the bit from going more than a couple millimeters in). I then made a somewhat larger hole in the same corner of the black plastic that surrounds the AC screen on the outside of the trailer. Looks are unchanged unless you know where to look and it works without jacking the trailer up on one side.
While I had the AC out, I also worked on the aluminum tray the trailer came with for under the AC unit. Mine stopped well short of the wall, so any water that got on it would just run down inside the wall. I reworked is to that it extends out to the plastic surround and will drain through the same hole the AC drains through.
BTW - it's not a Danby issue. (Danby is actually a decent brand.) Frigidaire, GE, Amana - they're all designed similarly. (I wouldn't be surprised if they're all made in the same Chinese factory.
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