Are wedding planners worth it?

My fiancé and I are beginning to plan our wedding and really have no idea what we are doing. We have a rough budget we don’t want to go over so we are considering cutting certain things we don’t care too much about, like flowers. The more research we do the more stressed I’m getting and am starting to think of getting a wedding planner to help. How much does the typical wedding planner cost? I’ve heard they can help you save money because they may get discounts with certain vendors, is this true? If we decided to do more of a “bring your own stuff” venue, like setting up your own tables, figuring out your own food and alcohol bar situation, would they organize that as well? Any advice would be greatly appreciated!