If so, is there a way to get bracketed shots along with the intervalometer rather than single shot taken manually?
You would need a script specifically written to do that. I think some have been posted. I don't know if any are recent or work on your cameras, but you could try searching for "bracketing intervalometer" or "HDR intervalometer"
I think CHDK bracketing will be applied in script, but the script would need to use key presses to hold the shoot button down for however many shots you wanted to bracket, so you still need a custom script.
I have thought about adding bracketing functionality to
rawopint, but haven't got around to it.