You didn't mention the environment you are recording in, but I'm guessing Super/Hyper cards probably aren't the answer. Where those do well is recording from a good distance inside arenas. Because they are so directional, they reject a lot of reverberant noise, which probably isn't your problem.
Getting above the crowd will help, and windscreens are a must outside, but if you have a chatty crowd, there is only so much you can do. If you want to invest in mics, just buy a good pair of cardioids. A long time ago a friend told "90% of the time cards are the right choice and they are never the wrong choice." You can get a pair of Line Audio CM4s for around $600, and if you are patient and watch the yard sale, you can find other good deals.