I'm coming in on this way late, but here it goes...
I am a huge fan of CO2 systems for several reasons. I have a 10, 15 & 20 lb CO2 setups. I recently used the 20lb'er to fill up 12 tires in Moab, it didn't freeze, never has in fact. There are several places here in SLC to fill them, even with the 20lb'er I have never paid more than $10. I am into my steel 20lb'er ~$75, my steel 15lb'er ~$100, and my aluminum 10lb'er ~ $75
The York compressor is also a great option, but it has its downfalls too.. It only works when the motor is on, and it only works within reach of the problem. the CO2 can be lugged up a hillside or trail to reach the need. Mounting and plumbing can be an issue in a York, not a big deal on an older rig with plenty of room under the hood, but it would be a tight fit in a Tacoma, 80 (as Boston highlighted, etc.). I used to install them on customers rigs years ago... they were the bomb and I always intended to put one in mine... with the CO2 I have no desire. We ran a full York system on the comp buggy, and it does kick some butt!
I have an ARB compressor in both rigs, just as many have said its best used for the lockers
I have filled several tires with it, but that stopped with the CO2 addition. Its alot of work on the ARB compressor, and alot more time.
Will mentioned the worry of leaking CO2 tank... Not a big issue? Your just as likely to lose your motor oil, or your antifreeeze as you are to lose all your CO2. They have a time proven valve (think of welders, torches, helium, medical, etc) that they use the same valve for... it doesn't leak, even if the valvle leaked, your regulator (also used for medical-industrial applications) won't leak... redundant systems prevent issues. :ylsmoke: