I done this for a local ARES bunch in SouthEast Louisiana and it was very simple if the following caveats are followed:
1. Incorporate as a non profit under your state laws. Since you did not say which State, you need to check withsomeone knowledgable on State Law. Here in Louisiana, the forms for incorporation may be downloaded from the Secretary of State's Website!
2. Apply to the IRS for 510 (c) 3 status on form 1024, remember, it is slow process. Read the instructions, it is not hard, just tedious.
Check out http://www.ares.org/fundraisinghttp://www.arrl.org/FandES/field/forms/ARES-Registered-Trademark.pdf/articles.htmhttp://www.ares.org/fundraising/501.pdf