I have hiked everywhere in the Smokies, Laural Falls is an easy hike and on your way to Cade's Cove. Abrams Falls in Cade's Cove is a fairly level hike, can't remember the distance but think it about a mile and a half one way. If you go to Cade's Cove, plan to be there about an hour and a half before dark, the deer come off the ridges and into the fields at dusk. You will see a lot more wildlife late in the evening than during the middle of the day. Traffic will be bumper to bumper as you drive the 11 mile loop. If a bear steps out it becomes a circus with people doing incredibly stupid things like getting between a sow and her cubs.
It is best to stop at the Sugarland Visitor center just out of Gatlinburg on the way to Cades cove and pick up a hiking trail pamphlet to find out where the trails are.
You can always stop at a trail head and walk in to the extent of your ability and turn around and go back, I have done this a bunch and seen some wonderful stuff. The arrow shaped trail markers are abundant along the main roads.
If you go to Newfound Gap, the walk to Clingman's Dome is paved and steep but not too long, nice view from the overlook on top. On the other side of the parking lot the trail to Mt Leconte Branches off to Charlie's Bunyon for another nice view, this trail is a bit rocky and washed out though.
If you want to see the most beautiful places, hike up the north side of the mountain anywhere. All the spruce trees, Hemlock trees, rhododendron and rushing streams are on the north side of the ridges.
This is Laural Falls;