The Risk and Responsibilities of Rafting & Canopy Tours While Wildwater Ltd., Nantahala Gorge Canopy Tours, & the managing agencies set a minimum age and/or weight for trips, you must also evaluate your own fitness level. Participating in outdoor activities involves inherent risks, and can be physically demanding. If you are seriously overweight or have special medical conditions, you should consult your physician before participating. You cannot go if you are pregnant. All Guests go at their own risk and are required to sign a waiver of liability. Alcohol and illegal drugs are not allowed on or immediately prior to trips. We will remove from the trip anyone under the influence of these substances, and no refund will be made.