Better way to make ASP.Net MVC checkboxes keep state?

Question

I have the following situation: I have a class Product that can have a confirmation from various Stations. So I have a ViewModel that holds the Product information, and a list of stations, and all the ProductStationConfirmations.

public class ProductViewModel
 {
  public Product Product { get; private set; }
  public List<Station> Stations { get; private set; }
  public Dictionary<string, ProductStationConfirmation> ProductStationConfirmations { get; private set; }

  public ProductViewModel(int productID)
  {
   // Loads everything from DB
  }

 }

In my partial view for inserting/editing I iterate over the stations to make a checkbox for each of them:

 <div class="editor-label">
  <%= Html.LabelFor(model => model.Product.Title)%>
 </div>
 <div class="editor-field">
  <%= Html.TextBoxFor(model => model.Product.Title)%>
  <%= Html.ValidationMessageFor(model => model.Product.Title)%>
 </div>
 <fieldset>
  <legend>Station Confirmations</legend>
  <% foreach (var station in Model.Stations)
  { %>
  <div class="nexttoeachother">
   <div>
    <%= Html.Encode(station.Name) %>
   </div>
   <div>
    <%= 
  Html.CheckBox("confirm_"+station.ID.ToString(),
  Request["confirm_"+station.ID.ToString()] == null ? 
     Model.ProductStationConfirmations.ContainsKey(Entities.ProductStationConfirmation.MakeHash(Model.Product.ID, station.ID))
   : Request["confirm_" + station.ID.ToString()].Contains("true")

  ) 
  %>
   </div>
  </div>
  <% } %>
 </fieldset>

This works and I can process the Request values to store the confirmed Stations, but it is really messy. I made it this way to preserve the state of the checkboxes between round trips if there is a problem with the model (missing title, bad value for decimal, or something that can only be checked server-side like duplicate tile). I would expect that there is a nicer way to do this, I just don't know what it is.

I suspect that I need to change the shape of my ViewModel to better accommodate the data, but i don't know how. I am using MVC 2.