Easier way to do this? (tuples & parameter packs)

[LB]

http://ideone.com/vEq9cd

I feel like a mad genius, but that probably means this is overly complex. I even had to look up a stack overflow answer for how to store a tuple and call a function with its contents:
http://stackoverflow.com/a/7858971/1959975

I also couldn't make this work with std::forward, which would be nice.

Any suggestions? (see also http://stackoverflow.com/q/20024517/1959975 )

EDIT: Note: I don't want to change the interface of RAII_Set

[LB]

This implementation really feels like overkill to me, and it just seems like there should be a simpler way of doing it, but I'm not fully sure how. I think a good way might be making a separate inner object for each member, but I don't know if that is more or less convoluted.