More than any other tourist attraction we've done, PF and Gatlinburg can be Disney expensive or one of the cheapest getaways you will ever take.
I concur to look at hotels in PF and on Tripadvisor. As a whole, most are well maintained. We rented a unit at the Summit about 15 minutes directly above Gatlinburg for our last visit, it was $79 a night. Didn't include breakfast but we didn't want to eat there anyway. The view was amazing. There were fireworks the evening we were there, and we looked down to see them.
Apple Barn is a must do for breakfast. I've actually driven 3 hours just to have breakfast there, then drove back home. Love the fritters.
Spend time in the park, another vote for Cades Cove from here. Take time out at the various stops within the cove and look at the historic buildings, cemeteries, etc. It's been awhile but we normally stop at the IGA in Townsend(is it still there?) just before entering the park, they have a good variety of sandwiches and picnic items to have inside the park. Just watch out for the bears and from experience, if you see a cub, usually a ticked off mama is somewhere in sight. Usually you can tell a bear sighting in the park by stopped traffic.
A stroll through Downtown Gatlinburg to just to peak at the shops is a nice relaxing evening. Grab a few snacks, there are different food shops all over.
There are dozens of mini golf places in the area, Hillbilly seems to be the one recommended most.
You can shop at the outlet malls, hit amusement parks, do dinner shows, hit exhibits like Ripleys and the Titanic, or you can just chill on the balcony of the hotel and enjoy the beauty. You can get a condo and get groceries at Kroger/
Walmart, or stay in a hotel and eat steak out, your choice.
Traffic can get extremely heavy on the parkway on Fridays inbound and Sunday outbound, be aware that even though you may be 20 miles from Gatlinburg, it might take over an hour to get there.