Is there any disadvantage to removing the valve cores and re-installing them over and over? Seems like a cheap idea. I like being able to do all 4 at once with my deflators, but I may start recommending the valve core remover idea in the future.
Carry spare valve cores, cold hands, gloves, muddy ground and tiny valve cores don't mix
The EZ-Deflator style is a unique design in that it actually pulls the valve core so you get that speedy air down, but it holds the valve core in the tool so you simply move the slide out to release the air, slide it down to check the pressure. Once you get where you want to be you screw in the core and move to the next tire. So while they are ~$35 they act as both your air down and your tire gauge all in one... so price wise they are one of the best 'bang for the buck'.
On that note having a good tire repair kit is an essential piece of equipment for all. There are several great options out there, I've become partial to the ARB Speedy Seal kit not just as a retailer but a VERY often user myself. On the
Utah Cruiser Expedition last fall we literally used over 20 tire plugs. Bar none our Speedy Seal kits were the single most valuable tool/spare used on the entire trip.
The ARB Speedy Seal kit (pictured above) also comes with a small valve tool kit, a valve stem repair too (for fixing buggered threads), spare caps, spare cores and then of course all the needed tools for plugs. I've got plenty of those around if anyone is looking