Anyone got any ideas for two mods: One, to allow a horse to follow the preferred pathgrid when being ridden unless the left/right keys are being pressed?
Two, best way to spawn a container you can store things in, that will disappear (container and all) when the cell resets?
Don't think the horse can have any packages running on it when the player mounts without causing an error. Don't think you can move the player with packages. The closest you might be able to get is a furniture marker which is moved and rotated to the location of an NPC or creature, but that can have some problems.
For the container bit, your best bet is to probably cycle amongst a list of 10 persistent containers which are either cleared and moved back to a holding cell upon reset, or cleared and moved to the new location it the script cycles back to that container. Positioning it within a given cell however can become rather problematic. You can get a vague sense of where the ground is by dropping an object with a heavy collision (like a shield) that has its visual parts removed, checking its location after a second, recording its location, removing it, and placing the container there, but it doesn't always work well.