Look for contrasts in values of light and dark or contrasts in color. If the large expanse is too much, look close for what is nearby. Find the painting that best expresses the location to your artistic satisfaction. When painting outdoors the artist has to be able to adapt to changing conditions and deal with unexpected situations. One artist painting a watercolor of a rocky coast had to adapt the forground rocks to incorporate a passing seagull's contribution to the work.
Wind can make for faster drying conditions than in the studio and weather can be unpredictable.
Such situations give art done on location a spontaneous quality that often brings out the best in the artist. Enjoy the experience. When you are painting outdoors don't expect the same control you have in the studio. The resulting painting, even if you complete it later indoors, will have a freshness that is not possible if done entirely in the studio or from a photograph. The finished painting is not just a picture of a location but it is also the artists experience of that location.