I love the Wyndham location for the same reason Von does---it's easy to get most other places without having to deal with the mess that is Parkway and you can avoid Gatlinburg entirely to almost any destination in GSMNP. It's even pretty easy to get from the Wyndham to Gatlinburg by taking Veterans and then the Bypass. There's only a small segment on Parkway, and that's not a particularly congested section. You can park at the east end of town, and everything is walkable from there.
And, if you are a theme park fan, the trip to/from Dollywood is short and traffic-free.
The only downside for me of the Wyndham is that it is looking just a little tired to my eye, both inside and out.
Full disclosure: I've never stayed at the HIVC, and that might be awesome too.