I used to just pull the sib along the road, about 400yds, then across the beach just using launch wheels. But they took a battering,
because to make it easy to pull or push it along I had to put as much weight over the wheels as possible.
In the end I made a trolley from parts of a garden cart and some square aluminium.
Now my mate who is cracking on a bit can maneuver it by himself.
Once down the beach we just take it off the trolley and launch using the launching wheels. I pull the trolley up to the hightide mark and secure it ready for when we return.