In this forum you can ask questions of the DD community and get answers. Other members can rate those answers to help you find the best solution to your query!
I generally go onesie over diaper, in the summer, and skip plastic pants, which I find hot. Compression pants add another layer, but they do help to smooth the silhouette. I generally wear oversized shorts or jeans, however, so I can I can get away with just a diaper under my clothes when it's hot, or the aforementioned onesie, and a diaper, if I'm concerned about waistline diaper sightings. I work from home a fair bit, so I spend a lot of the summer in just a diaper, below the waist, unless we're expecting company or contractors or whatever.