Thanks for the suggestions and support, everyone. I buried her in the backyard, at the base of a tree.
Cleaning out her cage and putting it in storage are turning out to be the harder parts...she'd been with me since I was a little kid. I keep hearing phantom chirps. I'll get better, but I hadn't realized how attached I was to her. It's weird to enter the house without her squawking hello.
Anyhow, thanks so much for the help!