Would anybody be able to point me to some examples of past sponsorship packages from previous conferences?
Well, I've looked around a bit and it seems that it unusually tends to be on a custom/contact basis. However, I've found one list that might be of help to you:
Inside Bitcoin.
Hello all,
I am helping to organize a Bitcoin conference in Saigon.
I am not at liberty to release details just yet, but we will begin contacting potential sponsors within the next month.
May I ask when this conference might take place? Q4 2016?