Portable generator for boat?

Hi, I have a 30 concept with a major sound system! Here in Miami the columbus day regatta is this weekend from friday to sunday. I will be on the water these days straight. I want to buy a portable generator but I don't know if can just buy one at a local hardware store like for a regular home or do I need to buy... show more Hi, I have a 30 concept with a major sound system! Here in Miami the columbus day regatta is this weekend from friday to sunday. I will be on the water these days straight. I want to buy a portable generator but I don't know if can just buy one at a local hardware store like for a regular home or do I need to buy a special marine one. Please advice. Thanks
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