not much to add to all that! just portable air compressor and tire deflators. some good reviews on that stuff:
Tire Inflator Comparison
Tire Deflator Comparison
I can vouch for the MV-50 compressor, very cheap (got mine for $25 on clearance) and just as effective as $300 models (actually identical to Vaiar). The Staun deflators are great too, just need to keep them lubricated.