Bark61, not a whole lot of climbing, but it'll definitely be more complicated than walking along a manicured bank tossing bobbers. There are holes here and there where you can set a line and wait, but you'll benefit from being mobile and wading stretches. Park at the trailhead in Peninsula and go upstream or downstream, whichever you prefer. A bicycle allows faster travel to likely spots, and carry more gear if you'd like to pack a big lunch, etc. Great way to combine two activities, especially for kids!