Re: August Fishing Conditions??
August can be an excellent time to fish the Rocky Mountain west- grasshoppers, ants, beetles, and other terrestrials are the big ticket items, but their are plenty of hatches of Pale Morning Duns, caddis, and other aquatic insects to keep you busy.
That said, there's an awful lot of distance between South Carolina and the Rocky Mountains- and there's plenty of quality fishing to be found in the Appalachians. Northern Georgia, eastern Tennesee, western Virginia and North Carolina combined have a ton of miles of trout water, many miles of which offer wild brown, rainbow, and native brook trout. Much of it is high-gradient freestone streams, while others are tailwater fisheries. You can also target smallmouth bass and a number of cool-and warmwater species, which can be incredibly fun on fly tackle.
You may want to check out Smokey Mountains National Park in North Carolina/Tennessee, as well as Shenandoah National Park of Virginia- both are gorgeous and provide plenty of chances to view wildlife and do some fishing. If you're more curious about the western US, I may be able to point you to a few areas out there.