When I pulled into our driveway last night, I spotted what looked kind of like a fungus fest—in an area of the yard I'd worked just two days earlier! "Please let that be a stray paper bag," I thought. No—it was a large cluster of toadstools crowding a capped-off former spigot. I removed them, and then put on gloves and went to check for interlopers on the cherry tree. Removed 7 of those. Looks like this will be a nightly thing for a while. I Googled snails on fruit trees later to see if that was an actual thing, and it IS. Now I kind of wish I didn't know that.
There were several recommended solutions (most will not work very well if the snails are already IN the tree). I can tell you that I definitely will not be buying other snails as a means of taking care of the problem. HalfshellHusband would kill me. Plus, that seems like a recipe for different trouble down the road. :O