I had to look up the hunt in the regs, because I was caught off guard by the August dates.
Very Interesting - Master Hunter - any elk during the velvet
I have hunted the unit before, several times, but during muzzleloader (primarily) and a late season rifle cow tag I had 15 years ago or so.
I can give you some insight to the unit. It is a limited portion of the Ryderwood unit that is heavily bordered by farm land. They have a heavy volume of animals that hang near the farmers fields, which is the private land notation in the regulations. Many of the farmers aren't keen on giving permission, because they like to hunt it themselves. But the circumstances may be different for an August hunt.
The portion I normally hunt is owned by timber companies - Weyerhaueser and others. Most of the time the gates are closed, and walk in access only, but always worth checking all of the gates to see if there are any current timber sales/logging taking place. The area is riddled with 4 wheeler trails that are supposed to be closed, but can be some great walking if you are trying to make a hike from one portion of the unit to another. You can walk across the unit via these trails with fairly great ease.
I would think it would be tough calling in August, but I wish you good luck. I am happy to share more information, but most likely via PM. I tried to keep what I have said to common knowledge thus far as to not offend any of the locals, half of which are relatives.

Best of luck - get a hold of me if you are looking for more information