Watch the Harry Potter Section on youtube. That might give you a better idea. If you find it to be offensive you can stop the video and then you can base your decision. Hogsmeade you will have to walk though or take the long way around, I don't think there is a way around it.
I will admit I am not a huge fan of the Butterbeer, I am more into pumpkin juice. The person who compared to spiced cider is spot on. It tastes wonderful cold. They also serve a Lemonade which is very very tasty. I do like Butterbeer ice cream but it will hit with how sweet it is at first. I wouldn't catagorize it as a fall beveredge. Cell service should be fine.