I would bet that June will be $345. We just had a cabana at TL in September and it was the best money I have ever spent at Disney. Not having to worry about my stuff (clothes, towels, lotion, shoes) getting moved or taken. The cabana comes with 6 padded deck chairs (nice Adirondack style). 2 foot rests. 3 side tables. 1 locker (big enough to hold 6 cell phones, 6 magic bands, watches, jewelry, cameras, 6 wallets and still had plenty of room. 1 refillable mug per person. A cooler full of bottled water that we got to take at the end of the day. And plenty of dry towels. You pay out of pocket for food or beverages (adult) but the attendants will go and get it for you.
Several comments my family of 6 adults made: "wow I feel like royalty!" "I'm glad we don't have to look for chairs in the shade." "People are looking at us like we are VIPs or celebrities. Who should we say we are!" "this was the most relaxing day of our entire vacation. I will definitely book a cabana in the future."