If you had tagged along with Lewis and Clark they probably would have left you for dead after you twisted your ankle the first time, 10 or 15 miles from the first settlement. You could probably make your own way back before nightfall. Probably.
You give me way too much credit. I would have realized about 5 miles in that none of the boats have air conditioning and then Louis and Clark would have beat me back to base two years later because I got lost when they dropped me off. But I would still spread the rumor that there is dragons in the Pacific.