Lead warps from the cleat, through the fairlead, under the guardrail and back over the guardrail.
If the manoeuvre seems complicated, draw it out on paper to ensure everyone knows their job.
One person with a roving fender is useful. Fender the beam and the extremities of bow and stern as these may touch first. On the approach, ask the crew to sit down and not obstruct your vision. Ask the crew member at the bow to call the distance. Pontoons can be slippery. Step ashore – don’t jump. Consider using lasso lines as an alternative to stepping ashore.