Great Smokey mountain is nice but old/well used and very commercialized. Lots of people, and not the nature you would hope for in a National Park. A good vacation if you live in the region, but I would not recommend it if you are driving more than 300 miles.
Glacier National Park is a wonderful trip, however you MUST leave the parking areas. There is a lot to see, and there are moose,bear and other animals all over the park.
A very large park, expect to spend at least 3 days there.
This is a must see for the kid (who loves Dinosaurs) in all of us. A layer of sediment with bones it was naturally twisted upright. People can watch as paleontologists extract the bones from a wall of rock. A wonderful trip, and highly recommended.
As far as National parks/monuments go, this one is a little plain. There is the actual monument, which is a good hike, and quite neat to see, but other than that, there is nothing for miles.
Crater Lake National Park is a wonder afternoon. I would highly recommend this park, but would not expect to spend more than 3 hours there.
The water in crater lake is a gorgeus blue, and the boat that does tours is highly recommended as well.
I highly recommend this state park. In the Fall the leaves are a very vibrant color, and the water is a beautiful blue.
If you go in the fall, expect it to be cool and winds, so expect to have at least a sweatshirt.
This campground is in a wonderful spot right in the middle of levely Dauphin Island. It is very close to the fort, and a shot 5 minute bike ride to the general store. I would highly recommend staying there, as it is very pretty, and very convenient.
Duck Lake State park isd a relatively small, hidden park, but as a result, is quiet, clean and great for that intimate picnic, or relaxing retreat.
Would highly recommend going in the fall, when the leaves are red. There are also a lot of boating piers.
Bryce Canyon is a beatiful national park south of Salt Lake City. Expect to drive a significant ways up a mountain. Be careful with altitude, as it is similar to flying in an airliner.
Scenery is breathtaking, and relatively close to the parking area. As in all parks, talk to the ranger before setting out, as they are the experts in the area.
Zion National Park is a little bit of a drive from civilization, but is absolutely beautiful. Bring water and prepare for a lot of hiking, as the best parts of the park are a hike away.
In addition talk to the ranger at the gift shop before setting out, as he/she will know the best places to go.