Yeah, the MUNY is St Louis' outdoor theater, so that's only seasonal work. May still be fun and worth pursuing. I'm sure it wouldn't hurt to have on your resume. The symphony in town is pretty highly regarded, I'm told, and funded by an endowment. Which has, I'm sure, lost some of it's worth in the market. No idea if there's cross-over between orchestras.
My girlfriend is a printer by education (vocational high school, art college) but has no work experience with it. That, plus bad economy, plus dying trade, plus old-school union town = no jobs here. By actual work experience, she's a nanny and a retail queen. But you may have heard that the service sector isn't doing too much better.
St Louis has pretty healthy/diverse economy, but it's really spread out into the "metro area". You can end up making almost nothing or even loosing money driving out to the burbs for low-paying nanny and clerk jobs.
I like Philly. I'd be happy to take care of your house for a few months while yer sweating in the heat here trying to keep a cello in tune on an outdoor stage when the sun goes down and the temp/humidity drops. Let me know if you get an audition. At the very least, i'll p[ick you up at the airport and get you drunk. Maybe oogle you a bit. But no touching, I swear!