I only use a single camera at the reception. Since you have the freedom to move around and position yourself where you need to be to get the best shot I found a second camera unnecessary. It saves considerable on editing time too since you have less footage to go through.

During the toasts, I like to set up the 2nd cam on the B&G to capture their reactions. Then I'll either edit to show the toasters/toastees side by side or cut back and forth. A bean bag tripod works well if you can get the 2nd cam nice and close for the reaction shots.

Art

I would not use less than two cameras speeches. Both most likely operated from the same spot but one focused on the couple/bridal table and one on the speaker. Both set on high tripods so they go over the heads of anyone who walks in the way, or the guests has they stand for toasts.