When I went on the big slope the lift had a bar.
It's just simply because my little leg is not strong enough to pull up the board without the free foot helping. I'm going to try and make sure I keep my free foot on the back of my binding to help balance it immediately when I get on.
Don't worry -- it will come with time as you get better co-ordinated and efficient with your leg muscles. After a few times out, you will realize that you're swinging that board around with one leg without even noticing.