Push cart or sunday bag for me. I find that I play much better when I walk. It allows me to get a better perspective of the terrain and focus on the next shot more effectively. In particular, the walk up to the green allows me to see subtle breaks that I might not otherwise detect.
(Also a great way to combine a workout with something I really enjoy.)
When I carry, I normally take my D, 3, 5,7,9, SW P. This not only lightens the load but forces me to compensate for the missing clubs by hitting the ones I have varying distances.