By your very presence, and by your active participation in an international exchange experience, you can help challenge negative perceptions. People with disabilities who have traveled abroad have tried a variety of strategies.
Just as access is not perfect in the U.S., access won't be perfect when you are abroad. Laws similar to the U.S. may or may not exist in the countries you are considering for your international exchange experience. It is important to do your research and begin preparing for environmental and cultural differences in how disability is addressed in the country (or countries) you plan to visit. You might be surprised to find that some countries with less protective laws have very open and progressive attitudes toward people with disabilities.
Three ways you can help make a smooth transition into your international exchange experience are disclosing your disability, being your own advocate, and determining disability accommodations for access.