Well all I can comment on is up here in the coal country, But I have a battery tender on the Harley, the OEM battery lasted 10 years using the tender, and I have one on my little orange beasty. Makes things a little easier on the battery when its fully charged during the winter. If your not going to use it for extended periods of time, then by all means use a tender if you just fire it up and run for a short time put a tender on it. I not sure where you are but I don't think cold will be to much of an issue but long time not running it might be. Sears has them for like 30 bucks and when they are on sale like 20,, as far as I am concerned its cheap ins for your battery.
As for the block heater over here on the right coast, it stays in the low 30s in the day to teens at night, from like Dec to Feb and I have never had a problem starting her, one thought though if its going to sit for a long time outside or even in an enclosed building, use a good diesel conditioner in your fuel, moisture in fuel is no fun! And if ya gots mouses,, a box of moth balls scattered around, I don't know why but it seems to keep them at bay and outa da equipment.
The main thing is to have fun with it, and Oh yeah pictures we love pictures