When we bought our package we were told that we would only be responsible for tipping for a party 8 or more, since our party is only 4 I didn't think anything else about it, however from what I can tell now we are suppose to tip. How do we tip if we don't leave cash on the table do they give us a bill for the tip or do they charge it to our room? Do I have to sign something when it is charged to our room. We arrive Sat. the 19 so I need some fast feedback. Thanks