I just googled punpkin dump cake and a number of different recips came up - really good ones from what I read too. Google and see what you can find. Maybe you tweek your's and add in some new tasty ingredients.
This is a great idea to make. My husband & I are in a euchre card club with 3 other couples of some great friends. We each bring something, the hosting couple makes the main course and usually one or two other goodies too. Great fun with great friends playing cards and eating great food!