A.O, with your soil type down there, and the fact that you have the grapple attachment, I would hold off on the debarker. Having a forwarding trailer would benefit your better, just fall the timber, buck it to length, load them up and haul to the mill deck or log pile.. Having some sawn now, you could get lucky and have the bark to start slipping,, and while its fresh on my mind, you might try and remember when bucking your logs to length, 8', 10' ect, make sure to saw them over length, 6"'s is a good number, and try to keep all your logs the same length respectively.. It makes stacking and stripping so much easier, and produces much better lumber once dried, you will be surprised how little variations in stacking effect the out come of lumber once dried. Now back to the soil.. sand in the bark is as bad as anything else, except its harder to see at times. Its' very abrasive on saw teeth.