As my parents and inlaws live in two different cities we are dividing succos in half. first days and 2 days of chol hamoaid by my in laws. but since we live in the same city as my parents we will be by them for shimini atzeres but by our yeshiva (and our own home) for simchas torah.
rosh hashana we are haing my family for a meal, eating one meal by them and then probably making our own the rest unless someone invites us by then.
we have not yet had a pesach (we got married right after it) but will probably do first days by my parents and second days by his.