Bern,
The spi sheet can tangle on the snuffer mouth unless you run a light line from the mouth to the bridle tang fitting on the hull. This blocks the spi sheet from getting around the snuffer mouth.
As far as rigging.
Some people leave it all connected and just take sails down and undo forestay and one spi pole line and put the whole lot on the trailer with even spi pole and side stays attached.
So you need the spi pole to be supported by tieing to the
fron mast support on the trailer. Spi stays in the snuffer and all lines including halyard, spi sheets etc stay in place.
May take a bit of planning to make this system work for you but it makes rigging very quick.

Regards,
Phill

I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!