I've just done mine. Lots of **** in there, but otherwise dry
Pollen filter was stinky though so I've replaced that.
I know a few people like working on their own cars, but don't like getting underneath a raised car (even on stands etc). I'm not one of them, but I managed to clear the drivers side from underneath in no time with the car on the deck. I must have got lucky because I stuck my hand up around where I thought the drain plug would be, and hit right on it! A bendy aerial off of an old car up the tube, back out and job was a good'n! So it can be done, but probably much easier in most cases to get he car in the air...