A film speed of 100 ASA would work fine for this scene. There are many types and speeds of film available. Experiment and compare. Print film has a number of advantages that make it very popular, especially for snapshots. It is far more forgiving of bad exposures than with slide film, where your exposure needs to right on.
Prints are also much easier to view and share with friends.
The higher the ASA number of the film, the faster the film is and the more grain there will be in the photo. For landscapes, I use a 50 ASA film, because the finer grain results in sharper, more clear images. Once you are confident with exposures and composition, experiment with techniques such as slowing shutter speeds to blur the motion of the water or a figure, or try a colored filter at sunset. Take a camera along in your fishing pack, and don't forget to capture the amazing images that surround us here in Utah. .