This study investigates the influence of familiarity, structural constraints, and level of involvement in the decision on whether to search for information and on the strength of the search effort made by individuals who decide to search. Data have been collected from 1,677 structured personal interviews undertaken in two Portuguese national parks. Results indicate that financial constraints encourage people to engage in search but time and accessibility constraints do not exert any influence on search. Evidence indicates a tentative relationship between level of involvement and search effort and suggests this relationship is strongest in the early stages of the decision process. Finally, those who are less familiar with destinations are more likely to search for information about those destinations.