Well, those additional expenses would make it even more unlikely that your trustee would want you to convert to ch. 13.
My gut feeling is that nothing would need to be done in cases like yours until the 341 meeting, and maybe not even then. But local practice and the feelings of the particular judge and trustee one draws may say otherwise. Only a local bankrupcy attorney can really tell YOU what to do in the circumstances of YOUR case.
And, of course, you DO need to give the court your correct mailing addresses. In Massachusetts, that can be done by letter and doesn't require an amended form B1.