Unfortunately I have all that (a nice large AP enclosure, several hides, branches foliage and a large grapevine structure for him to climb on) and he'll come out of his hide late at night but during the day he's tucked away in his hide which is a good thing. I prefer my BOA who is perched out and about at reasonable times to view.
And I know you preach the hairdryer trick which I use 'every time' but that doesn't always fix the fussiest of eaters. It is what it is.