For anyone worried about the gas from an AR making you cry like a fat kid that was told he couldn't have another doughnut here is a product that may help you.
http://www.simplisticshootingsolutions.com/Products.php?no_redirect=true
I have not tried this but did read a nice review on...
You can put it all in an envelope but you must have a copy of your trust for each form. Usually people seperate each form with a paper clip. The check should be made out to DOJ per the form. That is who I made mine out to.