I'm a fundamentalist Baptist, and my church is an independent New Testament church. I'm not crazy about Halloween, just because the weirdoes get so excited about it. But as Care stated, we don't celebrate things for pagan purposes. So this year, my children are dressed as Guenevere and Batman and today are having a ball wearing their costumes at school. We will trick or treat...but I live in an area which is very small, very reserved, and we aren't likely to come up against any freaks out pretending to be communing with spirits or the elements or whatever, and in general making asses of themselves.
My churches have always enjoyed Christmas. We focus on the birth of Christ, though we recognize it was most likely a different day. THe point is it's celebrated. Some fundamentalists will avoid trees and some of the overtly pagan rituals, some won't. I like to have a tree. I enjoy holly. I know it all has roots in paganism, but that's not why I like it, so I don't see it really matters. I don't believe my church puts up a tree in the church itself, however. I think gift exchanging is kept to a minimum..and church services max out. We have dinners and special services and song programs etc. It's a wonderful time on so many levels.
And at my house...it's low key. Sometimes we have a lot of presents, sometimes almost none, it just sort of depends on what everyone is doing, how well prepared we are, who's working (those who are generally don't have much time to shop/prepare gifts) and who is facing a monetary crisis. We don't sweat it.
Don't know why Christian bashers are always so interested in what we are doing for the holidays.