I created a new widget called Newsletter2. I didn't have a lot of time for this, so basically just made a copy of the Newsletter widget, and renamed some items (mostly by adding a "2" to the end) so the Newsletter and Newsletter2 widgets can co-exist.
It can be downloaded here.
The Newsletter2 widget will save the list of subscribers in a file named newsletter2.xml in the App_Data folder (whereas the main Newsletter widget saves the list of subscribers in newsletter.xml).
Newsletter2 will only send emails if the item being saved is a Page (rather than Post) and if "eHikes" is in the title of the Page.
Give it a try when you have a chance.