I fish by myself about 95% of the time. I am fortunate that most of the ramps I use are 2-4 lanes wide. When they are not busy I just unload and pull my boat up on the ramp via a rope. I have a heavy duty hambys so beaching on the concrete is no issue. About 10-12 years ago I came up with a easy way to unload by myself. All that is in the picture is scrap stuff I had lying around. As you can see the corners of my truck bed has holes in it. I cut a piece of conduit that fits in it length wise. On the conduit I mounted a plastic spool and attached about 20-25 ft of rope. I have hose clamps on each side of the spool. This keeps the spool from moving around side to side and it keeps it aligned with the boat. On the rope I have a large D-ring clip. I get the boat ready to launch and back down. Once I am close to the water I stop and unhook the bow strap and attach the D-ring to to bow hook. Then I back in very slow. Once the boat starts to slide and becomes detached from the trailer I pull forward until the trailer is completely out of the water. One key thing is not to hit the brakes and "shoot" the boat off the trailer. Simply come to a stop and ease into drive and pull out from under the boat. If you hit the brakes the boat wants to shoot out into the lake too fast. Once you do it a few time you will be able to ease out from under the boat and the boat stays still just floating.
Once the boat is unloaded and the truck is pulled forward I stop the truck and park. I grab the rope and pull the boat up on the ramp. I unhook the D-ring and go to the spool and start winding the rope back onto the spool. I have a bungee that I keep on the D-ring and wrap around the spool so it stays in place when not in use. Look at the picture and you will see it. In the event there is not space for me to do this on the ramp I unload the old fashion way because I don't want to block the ramp and prevent someone else from unloading. Many time people freak out and start hollering hey your boat is getting away from you. Then they see my rope and realize how I am unloading. Over the years I have gotten very proficient at unloading by myself. I even had a guy one day tell me I got on and off the ramp faster than he could with a team of two people unloading. Multiple times over the years I have had people walk over and want to see what I have on the back of my truck. I started doing this 10-12 years ago and it's by far the best way I have found to unload by myself.
I bought two Talons a little over 3 years ago. After buying Talons I do it differently. Now I do not have the rope attached to the spool. I simply use the spool to keep the rope wound up. Once the boat starts to float I hit my remote and deploy both Talons. I drive off and go park the truck. When I get back to the ramp I unhook the rope and wind it up and throw it in a storage compartment. When done fishing as I am getting my boat ready to go home I get my rope out and wind it up on the spool and attach the D-ring to keep it in place that way it's ready for the next time I get ready to unload.