There was a nice view of Mt St. Helens & Mt Adams on the Ammefu Trail, are there any plans to make a larger viewing area there so Mt Hood can also be viewed?

There are no current plans to expand the view from the Ammefu Trail. ~CJ

This doesn't directly answer your question but you may it interesting. It's from the park's master plan. "One of the most impressive views available from the Chehalem Ridge is at its highest point, Iowa Hill, where an oak tree has stood for decades, surrounded by the densely-planted Douglas fir forests. Metro has begun selective clearing, thinning and management in this area for habitat reasons – but this also opens the area to stunning views of the Tualatin Valley and the Coast Range beyond. A trail connection to Iowa Hill will soon culminate in an overlook, with places to sit and interpretive information to allow visitors to pause and take in the view."