You want to stay for 3 days, but your bishop recommended you commit for only a day. It sounds like you should let them know that you're definitely staying for a day, but might want to stay an additional two. They can probably accommodate that.At the time I just told my Bishop that I want to visit the monastery, he told me to contact them. But I am not sure if he knows that I want to stay there for the day. :/
Our Cantor from Church makes frequent visits there.