Thanks @qgates, although I didn't use the subdomain routing, it certainly got me on the path I needed.
I ended up using part of the method referenced here
I basically created a Helper class that contained the getCurrentSubdomain method from that SO answer, hard-coded the domain.com in app/config/app.php, and then called the method in the controller, or view, or wherever I needed it.
In a controller...
public function index()
{
$subdomain = Helper::getCurrentSubdomain();
if ( $subdomain == 'sub2')
{
return Redirect::to('page1');
}
return View::make('index');
}
Or, in a view...
@if (Helper::getCurrentSubdomain() == 'sub2')
<title>Title 2</title>
@else
<title>Title 1</title>
@endif
Perhaps not the most "Laravel" way to do it, but seems to work fine in my case ;)