I prefer backpacks and have the Lowepro Fastpack BP 150. It's great because it has a lower padded section for camera gear and a separate top section for other stuff, like a light jacket. The camera section is side loading, so you can quickly store your camera when going on rides. I can carry two Sony a6000 with attached 18-105mm and Sigma 16mm lenses with enough space to carry a prime and other small accessories. There's also a larger Fastpack 250. If you like a sling bag, I also have the Lowepro Slingshot Edge 250. It's smaller and a lower profile than the Fastpack. I have the Manfrotto Advanced Camera and Laptop Backpack, but I found I kept bumping into people and decided it was too big for the parks.