You find excellent private accommodations in Medugorje and the surrounding area at any house with a SOBE (rooms available) sign out front; or contact G-tour Medugorje (tel. 036/650-126; fax 036/650-156; www.globtour-medjugorje.com) for help. G-tour also books guides who speak a variety of languages.
Once you head north toward Hercegovina from the E65 highway, you can literally follow any bus on the road to Medugorje (although some continue past the turnoff toward Mostar). Most carry people on organized tours, but there are public buses to Medugorje, too. Makarska and Zagreb also run regular buses to the Bosnia-Hercegovina pilgrimage site.
Everyone walks in Medugorje. In fact, many buses leave and pick up their passengers 1km (1/2 mile) outside of town, though St. James Church in the center has a huge, free paved lot where cars and some buses park.