For the tourist organisations there is an opportunity. It is not rare for them to have photo competitions. The purpose of such a competition is to enforce the tie with the people who went before. A typical requirement in such competitions is that people transfer copyright.
When the competition indicates that the pictures will also be made available to Commons so that the pictures can be used in Wikipedia, there is an added motive to participate. A competition could be made even more interesting when the writing of articles in Wikipedia using the pictures is part of the criteria for judging.