Elevated Wooden Dog Feeders Need Advice For A Wheelchair Accessible Wooden/cement/asphalt/other Walkway On Horse Farm?

Need advice for a wheelchair accessible wooden/cement/asphalt/other walkway on horse farm? - elevated wooden dog feeders

I built the project for a memorial garden will be this spring / summer. We need to build a wheelchair accessible walkway from the parking area and garden. Probably about 300 feet long, most are somewhat lower. It is located in southern Wisconsin, with direct sunlight throughout the day, he must cope with the weather. I did some research on concrete and asphalt, and I think a wooden footbridge can be built cheaper and easier. It would be on the floor for most, and possibly increased slightly to facilitate downhill track, which appears in the code.

I wonder if anyone has any suggestions. Wood is the best way forward, taking into account the slope? Concrete is poured into a difficult climb? What maintenance can be expected to do with wood, asphalt and concrete? If a wooden walkway, there is a paint or sealer that we can get locally, the well seals and provides the traction and support in the direct sunlight exposure? Thank you!