The Alora Ambiance line of reed diffusers and heavenly scents (we love Due in particular) are pricey and totally worth it. We would normally eschew these as frou frou and unnecessary but when we added one to the bedroom we noticed that we relaxed each time we caught of waft of the scent. It is neither overpowering nor muted, it diffuses just the right amount of smell around the room to make it fresh and soothing.
So if you plan to spend August at home, we seriously recommend that you invest in one of these. Ours lasted for months and never lost its intensity (and also never made us sneeze) and made us feel like we were staying in a fancy hotel. See the whole line on the Alora website. We bought ours at Planet Blue on Main Street in Santa Monica.