My droid beeped and booped through out the land, it was the coolest thing. Yeah I would want to keep him with me while walking around.
I can tell you that there is very little policing of lightsabers out. Actually photopass encourages you to take them out for pics especially at night. I'm sure if people get to rowdy with it security might step in
If you are doing GE in the am and wanted to drop your droid off to be shipped to the hotel after the fact, can you still do that? I dont want to lug it through HS all day!