What to expect for Kansas City Planet Comic Con?

So I've never been to ANY con before and just found out that a bunch of my favorite actors are going to be there this year so im trying to decide if I want to make the trip up there last minute. There wasn't any pricing for the photo ops on the website so first question is does anyone know what that cost is? Second is I want to see Matthew Lillard, and David Tennant bare minimum but what are wait times like? Would I need more than a single day to see those two? It would be cool to see Alex Kingston and Catherine Tate as well (huge Dr Who fan) but I don't want to just spend all my time in lines. I didn't see any schedule on the website either so aside from the list of celebs and some consplay stuff, I don't know what there is to do there or what seminars there are. Any advice or experience?