Man that just brought back many fine memories!
I only fished a couple sections of the Kings river when I lived in Ar. , but I think there is/was a great wade spot just west
of the Hwy 23(?) bridge.
The are a few more productive/attractive blue-ribbon smallmouth streams close enough to look at, as well, and probably on your way if you go up via hwy. 71:
Cossatot, s/w below ashdown
Ouachita (my favorite!) Mena to Hot springs
Buffalo, just east of where you'll be
The Little Red is your best bet for summer trout, I'd concentrate
on the smallmouth this time of year.
Good luck & tight lines
-Brian
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"OOOHHH! I got one, Daddy!"