My barrels were straight, but I liked a higher cheek-position on the stock when I shot bunker on the national team. I really got my head forward on the comb, making sure that I could see a healthy slope on my rib.
All the targets in bunker, even the lowest set, have a pretty healthy rise on them - I found having an aggressive 'up' on my hold meant I could shoot rising straightaways without having to cover them and shoot blind.
Worked for me, anyway - YMMV.
-M