(– by Hapla #6888 –)
I happened to read something similar a few months ago and can't wait to try it out now that my wife gave me a compressor for Christmas.
Lower pressures also provide increased grip and less risk of punctures in slow rock driving scenarios. Same goes for any slowly driven, uneven surface. Lower tire pressures (but not as low as for slow rock crawling) can also be of benefit when driving on faster gravel or dirt roads by allowing the tread to conform to the individual stones or sharp protrusions to help prevent puncturing. Remember to keep in mind that the lower your pressure are set, the lower your speeds should be.