Question Need Help Planning 8-Day Romania Itinerary

Hi everyone! My husband and I are heading to Romania in mid/late October for 8 days and 8 nights. We’re flying in and out of Bucharest and want to make the most of our time there. We’re interested in a mix of history, nature, and maybe a bit of local culture. Thinking about visiting places like Brasov, Sibiu, and maybe the Danube Delta, but not sure if that’s too ambitious. Any suggestions on must-see spots or how to structure our days? Also, any tips for October weather or hidden gems would be amazing!