The views, as other reviewers have said, are impressive and the Rim Trail is worth doing any time of day and any season.

One warning on the cabins though - in summer be prepared for some bugs.  Stayed in Cabin B in August one summer with my wife, who is tougher than anything but spiders.  I would have been wise to get there a couple hours earlier and let her relax while I cleaned the place thoroughly.  They were pretty thick throughout.

It's not that they're dirty, it's just that they're old buildings which aren't used every day surrounded by forest.  Naturally, you get spiders, rodents, etc.   It didn't bother me at all, but it did her.  Water pressure and hot water were not what one would hope if you want a shower as well.  

We both enjoyed the setting, loved the cabin otherwise, and loved the hikes.  We've done day hikes there with the kids' since, and in a prior visit I saw a bear go lumbering in front of my truck on the road to White Rock.  Only time in 40+ years I've seen a bear in the wild in Arkansas, and I grew up in the country! 

Still recommend White Rock, but if you're considering the cabins it's worth bringing cleaning supplies.  Even with that, they're a great bargain.