wow that situation sounds very familiar to ours. We have a 36 ft boat and setup almost exactly the same (except we have a finger pier on starboard side also). We have 4
lines permanently rigged to the pier which we drop when we leave. The two on the bow prevent the boat from going forward, two on the stern attach forward to the end of the finger (only 2/3 of the way out the boat also) and prevent the boat from going backward. As you may guess its the two on the bow that we worry about most when pulling in. However when its windy from the stern - which is often and a pain in the &^%$ to manage, my wife will pick up the
line at the end of the pier first and use it on the middle
cleat to slow the boat on the way by or pull us tight if there is a cross wind pushing the stern sideways.
I have never single handed into the slip but have thought about it. How about using a permanent long
line on the end of the finger, come out of the cockpit when the center of the boat passes, take the
line over the port side middle
cleat and carry it back to rear
cleat then into the cockpit. you then have a spring
line in your hand and can pull the boat tight to the pier as needed or stop it all together while still at the helm.
ps - we have a bowthruster also which is nice when the wind kicks up.