Could someone who has attended give me more information about the size of the personal bag you are allowed to bring inside? The Tauck paperwork says a soft sided bag no larger than 11-1/2 x 8-1/4. All items must fit within those confines, if I'm reading it correctly. So how do I get an umbrella, 16 oz. water bottle, wallet, etc. in something the size of a sheet of paper?