They do have private booths for the smols! A few of the tables have the little tables in the center, but with walls around them in case the smols want to relax out of sight of all the different humans around.
I don’t think smol kiddo Dean will be too overwhelmed by all his counterparts, they’ll let Sam fetch his older brother if it gets to be too much, and those two will be as thick as thieves. Sam will make sure if Dean starts to get nervous, they take a break in the corner, probably taking a turn on the arcade machines.
Brothers Apart 