Recently I travel all around my country in 20 days. I visit a lot of interesting locations and make a post for every locations I visit. This posts bring up my traffic with 40% in this period. So, if you do interesting things like visiting museums and another touristic places, participating in conferences or another events, always write about this on your blog. People will be interested about place you visit or events you participate. In this way you will bring some more traffic during your vacations.
Of course, this is not useful if you have a niche blog, except a travel niche where you will gain more traffic then a personal blog.