Light-colored suits are suitable for men, but black and dark grey suits may be too formal for the occasion. Women can opt for floral midi dresses, flowing maxi dresses, or other boho chic styles in muted neutrals and earth tones like shades of beige, green, and gold. It's important to layer with a light cardigan or shawl, as the evening can get chilly. Comfortable yet elegant footwear, such as heeled boots or flats, is recommended. Ensure your outfit is practical for dancing and moving around on grassy or uneven surfaces.