Having multiple sales channels can help ensure steady revenue/growth. It's what's kept us in business for so many years. At the same time, retail is a very different beast from selling online. Leasing/owning property, inventory management, staffing, etc, are all tremendously time-consuming.
If you're considering going down this path, just be very deliberate in identifying what you expect to get out of it. More sales? If so, is opening a retail location the best path to achieving your business goals, or would you be better off focusing on growing your online business? Or do you simply love the in-person interaction with other passionate fishermen? If that's the case, you may find better exposure and business opportunities attending shows, etc.
Crunch the numbers, then crunch them again. Be realistic and very conservative about your revenue expectations. Be very leery of debt -- it kills lots of businesses. Finally, think about where you want to be in 5 years. Changing trajectories is much easier with an online business than a retail location.
Best of luck, whichever path you decide to pursue.