damned abusive guides, the only thing they seem to know is the proper attire at the hot springs or if a boat has beer aboard. But, back to the question; At the ramp, those NRS truck battery jobs go pretty fast and on the river, the K-pumps are easy and stow well. Those Carlson Pumps however, have always had my eye when I needed to borrow a pump on the water. Use the gift wisely and give the giver a huge hug for a really nice present. Your decision boils down to just what boat is involved and how fast are you wanting to move air into or out of.