Question about offroading in sand?

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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by sfox:
The reason I won't advise someone to go below 20psi is that their normal operating pressure should be high 30's to low 40's. So half of that is 20psi. Going down to 17psi you are risking dropping it well below half and without beadlocks, you are getting into the realm of bead-popping IMO.

S </div></BLOCKQUOTE>

Have to agree with all he said.
I have off-roaded in dry quick sand in Utah, and never went below 20 psi and only two times have I had a problem. Once, I made the mistake of stopping, and used a hi-lift jack to get myself out, the other time, I stalled in a pit, and a H3 pulled me out.
Also, you can purchase one of the small cigarette lighter compressors, that cost around $40.00, and they will fill up a set of Jeep tires in less than fifteen minutes (Hummer tire might take twenty). Slow yes, but better than running on low tires while driving a highway.
The air tanks are inexpensive, but if you air down all four tires to 20, will they have enough to blow all back up to 35?
I always off-road in the desert and when airing down I find the time to inflate the tires a great time to drink water and eat power bars.