I’ve found clip-on mics, which are invariably condenser types, to be quite problematic regarding feedback, even outdoors and at moderate to low amplified volumes. If you’re going this route, you’ll need a way to cut the low frequencies (high pass filter), which are most likely to cause feedback. It’s good to have a plan B, such as an inexpensive piezo pickup, or take an electric bass just in case. There are too many variables outdoors, and it’s quite remarkable how much wind noise a clip on mic can pick up.