Game clips are expensive, you need to have it secured to your 'yak. We use a quick clip on one end secured to the 'yak, about 5' of bungee, then the game clip on the other end. Good cable ties help ensure any knots you use stay in place. You can get any length or thickness you want in a bungee cord where we picked up ours at UFO:
http://www.yelp.com/biz/ufo-upholste...fabric%20store We also bought plenty of length of bungee, and added hooks to secure our rods in the crates behind our seats.
Additionally we always bring along a nylon rope type stringer, the type with the long pointy metal tip to go thru the gills, and a ring on the other end. When you feed your game clip thru the 1st fish's gills, let it chill for a minute or two (or beat it into submission), then transfer it to the rope stringer. That way you have no interference when that big fish comes along to use your game clip to slide it into his gills while he's still in the water.
This method worked extremely well one morning when we both nailed 2 WSB each, all 4 about 40lbs or more a piece. If we hadn't transfered the 1st ones to the rope stringer, it would have been nearly impossible to slide the game clip into the 2nd ones with a 40 lb white already dangling on the clip. Food for thought.
Those nylon rope stringers are very cheap and worth having on hand.