Ok...I am calm now. Look. There are two really good reasons to use a float charger (a.k.a. Trickle Charger or Battery Maintainer) First, it will save you from needing to buy a new battery in the spring. Second, they are dirt cheap...particularly when compared to the cost of a new battery. It isn't complicated.
There are lots of trickle chargers out there. I guess maybe there are some bad ones, but I suspect the degree of "specialness" some claim to have to justify their inflated price tags is just bogus. I shop for units with a convenient array of connectors included for a good price rather than the ones that claim to have special smarts of some sort.
I have one with a 2-conductor DC plug on the end. It came with a matching female 2-conductor DC socket on a short wire that I connected to the main battery terminals. The socket hangs inconspicuously from the battery where it is easy to reach. The charger wire hangs from the ceiling of my garage where I park the bike. I pull in and plug in. No muss, no fuss. No wires to trip over. No dead batteries. Simple. Cheap. Effective. I like that.
You will too. Get one.