When you arrive at many national or provincial parks, you choose your site, then register at the gatehouse. We've seen families scout out a site, then without unloading, return to the gatehouse to pay for the site. When they return, they find latecomers setting up because there was no registration paper on the numbered post for the same campsite. It's an honest mistake, and gracious people would probably move, but sometimes it isn't that easy. If you do use a roof-top carrier or pull a small trailer, put in it what you best afford to lose, either to thieves or by accidentally losing container and all.
Locks deter only the honest, but insure that lids and doors stay shut in transit.
These vary from thin pamphlets to road maps to well-thought out glossy paperback books in full colour. Topics range from local flora and fauna to calendars of festivals, fairs, and special events to detailed histories. There are also local tabloids, often free, promoting area activities, shopping, attractions, and services to cover the interests of the whole family. Don't miss them as they can add to the enjoyment of your holiday. Several months ahead of your departure, write, call, or e-mail the tourism ministries of the provinces you intend to visit.