Will it say tickets available at the door? I cant tell if they are sold out for Candlbox.

Your best bet is to buy your tickets online. I have been to some shows that have sold out, expect to pay double. And that's if someone is selling, not many scalpers at this venue....

I must have the wrong number for the box office as I get some guy telling me about last weeks band. No live person.

Call the box office. They have live people answering the phones

Yea its first come first serve. My experience is that it's unlikely to sell out, but YMMV.