You can't use the coupons then for tickets, I don't believe -- that "cannot be combined" sort of idea. I don't see why you wouldn't be able to use coupons for souvenirs and stuff, though. Or Challenge Park, if you're planning on that, just not for regular admission -- you're already getting the group discount.
For where do you get the getaway guide -- search around, there have been tons of threads on that recently! :)
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PO!NT OF VIEW - A Different Look at Roller Coasters
http://www.crosswinds.net/~justmayntz/thrills/