Are you interested in cabins? When in August will you be attending?
If your looking for cabins Dollywood Vacations has some really amazing deals on Dollywood and Dollywood's Splash Country. I do believe you can get discount Dixie Stampede tickets through them (and possibly Ripley's Aquarium tickets, but you would have to check that by calling them as well). Here is the link to their special offers: http://www.dollywood.com/vacations-q10171-c10000-Special_Offers.aspx You may want to sign up for the park's email list if you have not already. Dollywood Vacations send out an email every few weeks with new offers, the current one is "Stay in May, Dollywood is on us." They always have length of stay passes (up to 7 days) available for the same price as a one day ticket (55.90 with tax for adult), always free parking, and they have recently started a complimentary one day pass to Dollywood's Splash Country as well. You also receive a coupon book for the parks ($600 value) when you stay with Dollywood Vacations. Season passholders receive 20% off cabin rental so it may even be beneficial to buy your season pass online now and then call once you receive them and save 20% on your cabin (you still receive the coupon book and such I believe), if you do have season pass you have to call to get the discount instead of reserving online without one. If you are choosing Dollywood Vacations I recommend calling early because they book pretty quick.
Since your going in August and if you don't already know their doing "DOLLYWOOD NIGHTS" this year August 2 - 8 the park will be open 10 a.m. - 10 p.m. (which they are only normally open 10-7 then) it is also the only time before Smoky Mountain Christmas that you can ride the coasters in complete darkness. So if it's possible to go then it would be a great time. That is typically a busy week as it is the last week before school starts but with 3 hours extra each night it will make it better. Also the "Arrive After 3, Next Day Free" offer is still valid then (if you do not choose the Dollywood Vacations option.)
Hope this really long post helps.