Need recommendation for a powerful battery powered stereo/speakers

CBear

I'm getting married with 35 people on a secluded beach on Lanai in January. Need to play some music but there won't be any available AC power. Any recommendations for something that has some power behind it and will fit in a suitcase? Price isn't much of a concern. All the reviews online list tiny ones. I figured some of the pro DJs on here would have some solutions. Just need to feed an iPod into it.