No gas motors even if they are sitting in the bottom of your boat. Know this from experience. When my dad adn i first went to Arvada, we took along a friends boat with a 15 horse. The rangers made us take the motor off before we could even enter. When we put it in the boat they told us that we had to have it away from the boat before we could go through. So we threw it in the bed of the truck. While we were fishing we saw them stop by our truck and get out. That is how paranoid they are about gas motors. But it is nice when you see the boat out in the lake but don't hear it. If you are hiking to the other side of the lake, be ready for a long walk.