I've done that a fair bit solo with my A-cat or F18...but I've overtensioned it that way too so I go back to the full body weight trapezing off the rear beam and it makes for a good tension I'm happy with (pulling at the rear beam gives a little more force too). As long as you keep the mainsheet with you and with a little tension on it, the traveler stays put pretty well....granted, if you're doing this with the sail, you need to watch the wind direction.