I know everyone's greatest fear is to show up and find out that they don't have a reservation.
This just happened to me. After a 12 hour day, I show up at WBC and I was told that they couldn't find my reservation.
I don't have a print out or confirmation from the company I booked with. All I have is something on my laptop showing my full payment to the company that I booked through.
Luckily, after a phone call to the company and much waiting - 50 minutes total from the start of the whole thing to a resolution - the whole thing gets straightened out.
Apparently, according to WBC, my reservation was sent over with the wrong name - because of a 1 letter typo.
Anyway, it all got straightened out. It really wasn't something I wanted to deal with after such a long day.
Next time to book through this particular company, and I've used them 3 times now (twice without issue), I think I'll call a few days before hand and make sure WBC has my reservation.