Best Way to handle different Menu BG images (Using UIToolKit)

Currently using UIToolkit to handle drawing other sprites in the game. Getting ready to add some background images for menus but was wondering what the best way to do this was. Do I use UIToolkit for background images too or is there a better way to do this? If you do suggest using UIToolkit, would I just put each BG image into the sprite sheet (which would then make the sprite sheet quite large)?