If I may... you also have the whole spa thing going on in Hot Springs for the wife/girlfriend if she wants some "me" time rather than going out on the trails. There is a great water park just a couple of miles from the park also if the kids would rather do that. Lots of other activities in the area such as the Mid America Science Museum (a must for the kids), race track, lots of lakes/camping, etc.
The park is roughly 1200 acres of well marked trails ranging from Sunday drive to I'm not doing that crap... The map is pretty good and the facilities are also. Y'all come!