Mid-day today, before the rain returned, we took several barrow-loads of gravel to apply to the worst muddy bits on the path across the property between Lisa's father's house and the old house in front of which her trailer sits, and then several more loads of wood chips to the medium-problem areas, particularly those where Lisa wants to be able to run the lawnmower this summer without sending gravel flying about.
Several years ago, Lisa's father bought a load of wood chips, not knowing that the falling of the two trees last year would supply us with a vast amount of the stuff. Lisa's first idea today was that we use the purchased wood chips because the pile is in a place she'd like to clear away. We pitched in to the fine-grain chips, but after hauling one load, it became clear that the pile of chips had sat out so long that they had turned into decent quality soil instead and would not be appropriate. I ended up pouring some of the denser-grade chips from last year's tree projects over the top of the one load of chip-soil I'd already dropped, and Lisa raked most of the chip-soil away. ("I could use some grass seed," she said, and now knows where she'll get material should we start trying to fill holes in the outer field.)
There's now about fifteen or twenty meters of the cross-property path covered with coarse-grade wood chips, and about the same amount near the old house paved with gravel, although I did need to lay down a new load of gravel on the path I graveled last year as the gravel tends to sink and the soil tends to rise.