Howdy Nicolle! Thanks so much for your question!
Be Our Guest Restaurant is amazing!!! I'm so glad you were able to get a reservation! You and your boyfriend will love the experience. Disney has really done a superb job with all aspects of this new restaurant. Be sure to visit each room while you are there.
Several of the Moms Panelists had the pleasure of touring Be Our Guest in December. It was an amazing experience and we learned so much. The Cast Member who gave us the tour did share that Beast has been known to surprise guests dining at Be Our Guest. However - there is not a set schedule like you will find at the Character Dining locations. No characters are scheduled to appear but I'm sending some pixie dust your way hoping you will be visited by Beast when you are having dinner in his castle.
Regarding PhotoPass +, I will send more pixie dust your way and hope for the best. As with Beast's surprise visits, there is not necessarily a PhotoPass Photographer standing by waiting for him to appear. If you see one while you are there, you can definitely ask the Photographer to take your picture.
Before checking in for your dinner reservation, you might ask a Cast Member if they have any further details about a surprise visit.
I wish I could tell you more but this is the magic that is Disney. I hope Beast surprises you while you are there in June!! That would be such an incredible experience!!
As you continue your planning, please let me know if I can answer any further questions for you. Have a magical trip!!
I feel obligated to make a suggestion to you while you are at Be Our Guest and end my answer with, "Try the Grey Stuff, it's delicious!" I tried it and was fantastic!