Hey Aaron,Soggy:The trouble I have with "always" using the rear dump is that, in order to get air out of the feet of your drysuit, you *have* to blow trim a bit (or at least in my experience). Thus, in order to use my rear dump, I'm constantly doing this seasawing motion...feet up to dump from the wing, feet down to dump from the drysuit.
Try to avoid using your whole body. Typically, just roll slightly to the right (this will raise the left side a bit) and raise just your rear end only, not your whole lower half....this will help you avoid shifting all that drysuit gas to your feet.
b.