personally i would use woodbark , its better an soaks up the water more .
my run is 10m by 6 m and its on my second allotment plot rite behind my house and i am stressing big time as i cant get the woodchips in as the tracks are to wet an boggy for the truck to drive on , i am praying it will dry up for next weekend .
for those who can roof there runs YOUR SO DAMN LUCKY
so wish i could do mine even if it only keeps out some rain .