ATTN SMOKERS: Due to the heat and the general hippy nature of the festival, many festival-goers will choose to ditch their shoes for the feel of soft grass of the polo fields between their toes. PLEASE do not litter with cigarette butts, and PLEASE PLEASE PLEASE if you must smoke and litter then at least make sure your butts are completely extinguished (ie. test for heat with your fingers) before tossing them! last year I had the unpleasant experience of stepping on a lit cigarette in the dark and damn did it sting and scare the crap out of me! That goes for roaches as well.
ATTN MUSICLOVERS: SO in explanation of the above statement, last year on Friday me and my friends wore shoes and found our feet became incredibly hot/sweaty. We noticed a large number of people going barefoot and since my parents have a summer cabin on a lake where I ran around barefoot for most of my childhood/teenage years I was all up ons.
The first day we carried our shoes around, then sat and sun we left them in the tent. There is no gravel anywhere near, and the polo pitch grass is incredibly pleasant, plus due to the dry heat of the desert it tends to stay quite clean and definitely does not attract mud (though there is a patch of sandy road between the campsite and the parking lot, but the dust in the air will cake you within a few hours so it didn't really bother us a lot). I therefore HIGHLY RECOMMEND making like a hobbit/hippy and going barefoot it is absolutely splendid, with the only major risks being cigarette butts as I have noted above (though I was the only one in my group unfortunate enough to step on one, and i jumped off immediately so there was no actual burn damage; therefore I deem it to be worth the risk).