Also it seems like most stealth tapers prefer omnis compared with cards. I am buying both and plan to use omis when I'm close to the PA and cards when further away. Is this a correct strategy or is it overkill? I try to get seats in the first 10 rows if possible.
fyp
If you don't have to conceal your gear, then most folks I know reserve the omnis for outdoor work. If you do have to hide your stuff, then having mics that are very small, and sound good sort of reduces your options (to a bunch of omnis and a couple of cardioid mics, especially in the sub $500 range).
But yes, the gist of your post is correct for stealthing (and you've selected nice gear for the purpose); use omnis when close to the PA and doing stack taping, run cardioids when further back or trying to create a better stereo image. The best 2 pieces of advice I can give without more info is; to learn about how sound propagates and reflects (e.g. where does it sound like ass in a venue and how to figure out the sweet spot). Second, experiment with getting your gear in at places that are not near where you live (so when you get caught, you won't be going there again and won't feel bad about not going there) and once you get the hang of that, try recording bands you're not terribly interested in down at the local bar/club/theater so you get a better idea of how things work.
Ironically, given the latter, I'd find a band that allows taping and go there first with your stuff, that way you're not trying to learn how to get gear in *and* make a recording simultaneously. Plus, there is likely to be another taper there who can answer questions in the field.
Oh, and read lots, especially the stickies in each forum section. Best of luck and welcome aboard.