If I don't have a known family minhag regarding this, how should I decide whether to wear tefillin during Chol HaMoed? Which communities generally follow each option, and what are the reasons behind each?
Also, does it make a difference if I am in Israel (either for a visit or permanently)? I hear that in Israel as a whole there is a pervasive and strong disposition not to wear tefillin during Chol Hamoed. And if I am supposed to wear tefillin, what would I do on 2nd day on Yom Tov if I am visiting Israel?