You can buy everything you need at Loch. They sell plastic bit bigger than a licence plate, you put your stickers on and then tie that onto the boat.
Or make up some plates and save 10 quid if you wish.
If you launch at Balloch memorial slipway it is £15 from memory plus the stickers/plates. The facilities are brilliant there and worth the money for launching. Also buy a map of Loch from the slipway ranger station and make sure your depth sounder is set, it gets shallow quickly in places but only an issue around the islands generally and you are speed restricted anyway at those points.
Amazing place to visit so worth doing.
video here shows where our boards were. the ones on my rib (A frame) are the ones LL sells, not sure about the others but looks the same.
