No, the rear locker isn't all that deep. It's not shallow, but it's not deep like our Tige's. We had a single 750 pound bag and when we filled it up to around 500 or so pounds the hinge mechanism wouldn't keep the door closed. If you want to weight the Epic, you really need lead for that back locker.
The wake on the regular side was incredibly steep. GREAT for folks like James that do aerials. The lip was so hard, it was like a kicker - literally it would boot him into the air. WAY too steep for baldING folks like myself.
I think it would be good for longboarding also. The curl at the back of the pocket would keep the tail in place.
I'd bet that if you had some time you could mitigate that steepness by placing weight here and there, but my guess is that it will always have some steepness.
The darkside wake will need some help, the swimdeck issue would have to be addressed. On the regular side, the swimdeck didn't hit the water, but on the darkside it hit without much issue.
The Epic has a ton of ballast. 1,500 on a side and 1,000 up front. It seems to like some weight up front, too. However, the weight on the side is mostly amidship, not towards the back. The pocket was exceptionally long and the wake had really great push. We surfed at speeds in the 14mph range at times.
12.1 to 12.9 seemed to be the best.
I think that you can surf the wake, and create a wake on both sides that would be surfable with the boat going straight. I don't think it would be anyone's "surf only" choice, though.
We'd heard a number of people say that you can't surf it. The sales folks, like all folks that sell product, say it surf's like a champ, in fact there aren't enough superlatives to describe it!.
Actually Tom, the dealer was very straight up. Nice guy and honest. Anyway, the truth is in between. It's surfable, the ballasting is NOT intuitive and that may be some of the problem that folks are having. I've got a bunch more pictures if anyone wants to see them, just shout. That's my 2 cents.