I'm packing at the moment for our france trip on friday.  My ST4 hasnt used a drop of oil since i last did it about 4000 miles ago so i dont plan on taking any.  The rear tyre has that green stuff in it so that isnt a problem, and i read somewhere that you tend to get most punctures in the rear tyre anyhow.  I've added a n allen key set and a spanner to fit the levers and i'm taking a spare brake/clutch lever but thats it really.  
 Oh and i got European recovery plus medical insurance ( for both of us) from Direct Line for £44.00 which i was quite please with!
 
 Paul.