Something like that, yup. Well, 30 bottles is 10 litres is 10 kilograms...and that's the beer only. I've never thought about what a bottle weighs...but I guess it might be 15 kilograms in the end. Start drinking on the way, make a lot of breaks. And there's sometimes some kids from the village who offer to bring your beer to the outlines of the camping area with their handcarts for a euro or two.