I dont mind burning pallets one bit as long as you come prepared to CLEAN UP after yourself...
IF i bring pallets with me i bring one of those industrial size magnets along as well... When the camp fire is SEMI cool in the morning just swing the magnet thru the ash/area where the pallets were burned and walla... you just picked up all your staples/nails...
http://www.harborfreight.com/cpi/ctaf/disp...temnumber=36905