I find that when approaching the pontoon if you’ve got all your lines ready it’s no need to panic. On my mooring i berth on a 10m finger. As I slide into the berth I leave it in gear but just on tick over. My line is laid out with a enough slack to be able to throw the line a foot or two, catch the cleat then tie off. The forward motion of the boat continues and you take up the slack, then the line tightens and as it does so the bow will swing in and stay planted against the pontoon, allowing you to then tie off the bow. Take out of gear and then adjust lines as required. A bow thruster can be useful if the tide is running a bit but the forward movement of the boat should be enough to keep the bow in.