Re: Beaching matt?
What is the beach made of? If it is sand, you do not need the mat. If it is rock, the mat will be ineffective. If it is gravel, the mat might provide protection, as long as the holes are smaller than the gravel.
As TD says, just anchor the stern (calm water) in deep water with a rubber snubber in the anchor line. Now anchor the bow on the beach. When you want to go ashore or board the boat, pull on the bow anchor, the snubber will stretch and allow you to get close to the beach. when you get on or off the baot, the snubber will pull the boat back out to the deeper water.
For rougher water, anchor the bow out, and use the snubber on the bow line.