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I use a 9.25 sct on a cg-5 mount and an unmodded 550d canon. I get reasonable photos with 90 x 30 sec exposures, although I tend to use a fairly high ISO. The cg-5 has an autoguide port but I haven't used it. To polar align I initially use a laser then the all star alignment on the hand control. I get very little drift over 1 hour (sometimes less than 1') - the limiting factor with the exposure time is the periodic error - you might get 1 minute exposures. I'm fairly new to this too (about 5 months) and there is a lot to learn with exposures and processing.
Anyway you will get some reasonable photos with your set up - but you need patience - it take about 30-45 minutes to set up with a good alignment.
I suggest you get a dslr and use the set up you've got - then save for a better mount. I will probably get a cgem next (if I can convince my wife). If I was single I'd probably have a house full of telescopes by now.
good luck!
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