Here are a few guidelines. First, determine the level of the adventure and the type of trip you wish to take. Be sure to consider the individual experiences and expectations of everyone in your group. This is particularly important if certain members have special needs. For example, young children and people with disabilities or unusual diets have special needs that should be communicated to your outfitter.
Trips generally range from a half-day to a week or more.
Your group should reach a consensus in advance so that your professional outfitter can customize the trip to suit your expectations.