Neighbor across the road says he leaves his battery on a trickle charge. He only rides on the weekends and I'm thinking the dis/re-connecting every day would be a pain in the ass.
If you use a trickle charger make sure that you get one that has the "float charge" capability built in, otherwise you will cook your battery eventually.......I have a Honda generator, and used small trickle chargers for years, and unless you put them on a timer, and only charge the battery for an hour or so a day, the battery will eventually sulphate or boil dry.
Float-type chargers are available from any good cycle shop, and run around forty dollars, but since batteries (for my generator at least) cost eighty, it is a bargain. BTW, float chargers are designed to sense when the battery reaches full charge, at which point they reduce the output current to almost nothing just to maintain the charge......and can be left on the battery constantly.
doc
On Edit: These chargers come with a pigtail that connects permanently to the battery, with a polarized plug that can simply be unplugged when you ride, and re connected when you park the bike.