OP
Mink has some great advice. The last hiring process I participated at our "mob", we were pretty excited about one candidate via a phone interview. We scheduled a follow up personal interview, arranged the travel. Totally different in person and fell apart.
Any corporate interview, among the tech and background questions, comes down to, "can we speed a week on the road with this candidate, have a good time and trust him with the plane?". Keep that in mind, as Mink said.
GF