Wolf: Yes, that’s right. It’s a core principle of chassidus that it is important to have a connection with a tzaddik, who gives you advice (above and beyond making halachic rulings) about how to achieve your tikkun, your neshama’s purpose in the world. When you have a connection to a tzaddik, and he gives you advice, of course you take it! And Rebbe Nachman’s strong advice to his followers was to come to his kever on Rosh HaShana. (The rest of his advice is compiled in Likutei Eitzos, among other places). Now, if the “tzaddik’s” advice is against halacha, then of course the answer is to get out of there and find someone else to follow. But it’s not against halacha to visit the grave of a tzaddik on Rosh HaShana.
Think about the Gra’s statement that he would have walked across Europe to meet Ramchal. If Ramchal had given him advice, do you think he would have taken it? I would think so. So it’s not necessarily just a chassidic thing. If you had stood in line to get the Chazon Ish’s blessing and he gave you advice, wouldn’t you do what he said?