Seems to be happy :)
He's been under his log pretty much since feeding, changing positions every so often (either so he can be completely under the log, or so his head's poking out, or so his body is along the top of the log), I'd say he looks pretty content.
Hasn't wanted out :P so awesome, there!
Thanks for all the points and advice! If I hadn't had a discussion here I probably would have thought this prolonged lethargy/hiding was a bad sign :oops: