Are you taking a sleeping mat? I use a cut down square folded in half to pad out the back of my rucksack. You will be warmer overnight as well
Used to have the tent well folded to form a nice padding layer. Stove is the sort of thing I would want near the top so I could move it to my partner if he was going a bit too quickly for me.
Definitely get something sorted pre-race; what is 'a bit annoying' for ten mins can be a real issue after 5 hours.