I found a PC one time;  I gave it the hostname "catpee" and it was obvious why they threw it out.  :-P I let it sit in the garage for about 6mos and the smell faded enough so I could stand to get near and clean it.

My favorite diving gear, in order of importance:

1.  a willingness to leave the dumpster area as clean or cleaner than I found it.

2.  One of those "handy grabber" things.  I use a 48" Nifty Nabber (froogle search --https://goo.gl/Jlg4i ).  I also have a 36" that I prefer for walking picks.  The 48" is a little long but perfect for those picks wa-a-a-a-y in the dumpster.

3.  A rubbermaid bin in my car stocked with:  leather gloves for sharps, latex gloves for stickies.  Messy stuff sits in the tub until I can get home and clean it out.

4.  air compressor with blower attachment, as you point out.  Blow all that dust and crud out. 