When you transplant a tree you need to water it a lot for the first few seasons. On that note, keeping them happy and healthy for a month as the caravan travels might be a bit much, plants can be stressed. I'm not even going to try and fathom how it would work with a giant mushroom, although not clear cutting a tower-log farm could be expected to improve growth since it's a mushroom. Perhaps realistic pollination in that during a certain time (for a couple of weeks in the spring we're covered in pine pollen) new trees are seeded, to be invisible for a time until they become saplings, if not trampled and if you clear cut before then then you have to wait for seeds to spore in from the edges of the map.
The real question is, are planting orchards or tree farms and raising bees to improve pollination a little too much or should we just ask for a keep off the grass sign? (I just mark saplings restricted.)
Oh, and milling, we're being seriously robbed in how much wood we get. Maybe trees should actually grow so we can get a 30' pine or whatever and it's up to us to selectively log, like they do in some countries (saw a National Geographic podcast where the government instituted forest preservation procedures and the logging had to be done with elephants since it was spread out and machinery would tear up the ecosystem).