Use Linq generated classes in business-tier

Question

Context: ASP.NET MVC 2.0, C#

At the moment I use following pattern:

using (var db = new MyDatabaseDataContext()) {
    var model = new MyPageModel();
    model.player = db.blah.blah.blah;
    model.info = db.blah.blah.blah;
    model.bossKillCount = db.blah.blah.blah;
}

It works fine, one problem is that I have to redefine those models for each page, since models are slightly different.

QUESTION: Would it be OK to wrap db instance into MyPageModel class and keep data context open?

I feel that some sort of dynamic data structures would be perfect here, so I could use mix-ins to offload the model differences. I tried using inheritance but with single inheritance it didn't get much better.