Bolivian tourism has really taken off in recent years, but the industry and its associated infrastructure is still in its formative stages.
InfoTur (www.visitbolivia.org) offices are found in most of the major tourist destinations. The amount of printed material available and the level of attention from staff can vary from place to place, and from visit to visit. Don't expect a lengthy conversation if you go just before lunch for example. Note that the posted opening hours are not always followed.
There is plenty of competition between tourist operators in the most popular destinations and this is often reflected in their website content, driving the urge to provide more information to make the company more attractive. This can be a useful research tool, provided you remember the context the information is provided in!