Tomatoes pepper squash polyculture/ hugelkulture anyone?

Hey y'all, I'm about to plant some tomatoes squash and bell peppers. I also have a hugel- mound 4 feet high oriented east-west. Has anyone tried planting these in polyculture or guilds? What part of the mound do they grow on best?  I'd love to hear from those who've tried. Thanks, Huxley