User blog comment:BossDarkseid/Question regarding ME2 DLC and ME3 save importing/@comment-737801-20120201030631

First off, welcome.

As to your question, no you don't have to have the packs installed. You import the character, my guess is with a system like Dragon Age II did, not the packs. The data is saved on your individual characters and that is what you import. As long as you keep your saves, your ok.