Holding high intellectual standards for your students doesn't need to conflict with your giving them guideposts. They want help prioritizing and in understanding the heirarchy that exists within the material. In addition to preparing larger goals for a course, many professors begin class by giving a short of list of objectives or topics or some other introductory cues about what will occur in class that day. What they're doing is helping students organize knowledge, which seems an altogether appropriate function of higher education. Office hours are a nice idea, but you look sort of scary.
Research indicates students hesitate to talk to professors, even when they want to.
The availability of e-mail is revising this hesitancy for some students. Others need to be reminded that the office hours are there because you want to be available. Remind students about office hours occasionally throughout the semester. There are also some ways that students can ask questions in anonymous ways during class sessions.