Jack of Diamonds - like the art, but jazz up the negative space a little; it feels like there's too much emptiness. Perhaps a pile of logs in the background, or a log cabin, maybe even a large camp tent? As far as the fisherman's knot goes, some kind of knot is a good idea, but I have no idea what knots a lumberjack would use - you could research it or just leave it as is, depending on the level of effort you want to put into the design.
I like the Queen of Diamonds much better with a waist than without - she looks a lot less disembodied! Yes, a live tree to hug instead of a log would be better. You could also accent the look with a chain, perhaps with a padlock - many logging protesters chain themselves to a tree, refusing to be moved when loggers come to cut it down. Some kind of ecology logo on the shirt sleeve, or at least a peace logo, would be enough to really hammer it home that this woman is a "tree hugger" and not some kind of camp wench or something equally silly.
That queen has really evolved a lot - you're getting better with each go-around.