LOL Fernie,
I grew a couple of large indeterminates in hanging baskets last year under a cherry
tree and got decent production. One of these was Yellow Pear and if any of you are familiar with this variety, it will grow into a monster that'll eat your house if left unchecked.
growing it in a basket has the nice side-effect of keeping it somewhat contained. Sweet Baby Girl is supposedly a very sweet cherry tomato. I'm not sure if it's a hybrid or OP and have never grown it myself. I'd say go ahead and grow it in a basket, but do yourself and your tomato
plant a favour and choose a basket with the largest capacity your hanger can support. In my case, I used a 3 gal. basket because I was using a stout cherry branch for support. This serves a few purposes. It allows for sufficient root growth and you won't have to feed it as often. You'll still need to water 2x per day at least unless you get yourself a good drip system with a timer. The good news is that by putting your
plant in a basket (or other container), you will free up space in your garden for something else like more tomatoes? ;o)
Cheers,
Julianna