Yes, driving is sheer idiotic when wet.
If i was to used a forced air method, I'd use my good old air compressor with the dryers attached and the HEPA filter as well (used for painting cars) so this is by far the cleanest air, but I'd wet the floor first so not to P/U any dust. I had one area set for painting, fully enclosed, proper vents, all surfaces treated to keep dust/dirt to min.
For me, the CWB is fine. If the car is clean, it will not p/u any dirt, besides, it's checked each time during use. I have a small amount of water running that it runs under each wipe if needed. Follwed by a clean waffel.
Leaf blower method may be OK for some, but in the wrong hands and w/o a wet area to keep dirt down, dust is back on the finish.
Enjoy "blowing" your cars. Doh!
Regards,
Deanski