You leave it full so that there's no oxygen in the tank. Having O2 in there is what leads to rusting. After having it sit for a year you may not want to run it on that gas even with the stabilizer in it, so you should drain it at that point anyway. But you leave it full to prevent the rusting.
Errr... That's old timey advice right there. This is a modern fuel injected bike with a plastic tank. Plastic tanks don't rust very fast. Plastic tanks swell and deform when the fuel attracts moisture.
The plastic tanks do better if you run them completely dry. That way you won't have old fuel turning to varnish. I wouldn't trust a fuel stabilizer for that long of a period. Today's fuel is some tricky and nasty stuff. Fuel is weird stuff. I just poured a year old tank of gas with 2 stroke oil from my dirt bike into my lawn tractor and it fired right up and ran. I've had tanks of gas go bad within 2 months in the past. I'd drain it down and leave the filler open, not propped open so stuff can fall in, just popped open so air can breathe a little.
Don't worry about the tires and keeping it propped up. It's an 09 and unless you changed your tires in the past, they probably need to be changed anyway. So let them sit for a year and replace them with fresh when you get her back out. That's the safe bet. After sitting for a period of time unused, the rubber begins to dry and harden. They won't grab as well as you expect and could cause a slide.
You will need to plan on a belt change before riding it again. Do this after you remove from storage, not before. The belts are already at their suggested replacement age and another year won't do them any good.
Always remove the battery completely when not in use. If it was a couple of months at the house, I'd remove the ground wire, being that it's in storage somewhere, remove it completely. You don't want it to develop a leak and have an entire year to destroy things. Honestly after a year of not being charged, it may need to be replaced anyways. So if it's old, toss it and replace when removing from storage. If you think it's new enough, prep it (IE:fill it with water if lead/acid and charge whatever kind it is up to full) and place in a small wood or cardboard box. Placing a battery on concrete or in a metal container directly on concrete will kill a battery in a short time. The juice leaches out and to ground and they actually don't take a charge very well after that kind of drain down.
Oil up your chain so it does not quietly rust. You might consider a rubber safe grease (o-ring chains) that you can coat on heavily and plan to remove before you ride it again.
Pull the spark plugs and spray some oil in there. It's called "fogging". This while help prevent rust in the cylinder walls. Machine shops recommend an oil called LS-3 as it is slightly thicker than WD-40.
You might consider some of these bad boys instead of putting the spark plugs back in, http://www.skygeek.com/dehydrator-pl...FeuPPAodcEwACg
Just make sure it's the right thread for your machine. Most bikes are 14mm but I don't own a 696. The dessiccant will keep moisture out for a couple of months. They should be checked periodically and recharged, but hey if they protect your engine for 4 months out of the 12, plus your oil in the cylinders, your engine should be in good shape when you return. Generally you won't need this, but hey for $20 if you want a little more protection for your investment, there ya go.
Consider buying a bike cover to keep the dust off if the storage company does not crate the bike. I work in places like Central Van Lines and I see bikes and property tucked in corners with an inch of dust on them all the time. It's not there responsibility to keep the property clean. The store it the way the customer left it or for what they paid to have done. Cycle Gear is selling a lightweight cover this month for $20,
Drain the anti-freeze, it will cause all kinds of issues if left sitting in an air cooled engine.
Plan to drain, flush and refill all brake lines and clutch lines when removing from storage as they may have water in them absorbed from the air around.
You might want to hide a key somewhere on the bike that you can get to but nobody else will know about. I say this because a lot can happen in a year and you wouldn't want to come home to a motorcycle that you can't find the key to. Don't want to be a downer here, but I am in the fire protection business so I know fires happen, if your previous location were to have a catastrophic event while you are gone, there might not be a key when you get home. Just the Boy Scout in me right there, always be prepared. Back up proof of ownership. You might consider getting a bank deposit box to keep your Titles and keys in while you are gone.
Try and stay active on the forums while you are gone. Having some ties back to home will help the time pass in a more positive measure. Good luck and have fun.