Jaz,
How much is it bubbling? If the bubbling has slowed, go ahead and syphon it into your carboy and put an airlock on the carboy. Leave it at least a few inches air space below the airlock or it will probably blow the airlock off and make a mess.
Make sure everything is clean and sanitized. You can add a campden tablet to the airlock, but don't add campden tablets to the wine until it stops fermenting or you'll stall the fermentation and it may not re-start.
As Alanr said, there is no sure way to know when to transfer without taking measurements before and after with a hydrometer. I bought my first hydrometer in a drug store, but go on line and get one before your next batch of wine. It takes all the gamble out (well, most of it) of winemaking.
Also, what Alanr is referring to, using campden to sanitize, is making a solution of 15 tabs in a gallon of water, then using that solution to wipe down, rinse and sanitize equipment. Don't put that concentration in your wine. If you were trying to prevent re-fermentation when transferring you'd use one tablet per gallon in the wine.
Also, find a fruit tree near home and pick enough fresh fruit for your next batch! It's easy to come up with free fruit this time of year. Of course, ask the owner of the tree as they might have plans for the fruit!

Good luck! Keep us posted.
Wade