Thanks, that sounds like the perfect solution. I'll give it a whirl.
For anyone else, hope this deep link remains valid:
http://www.gnu.org/savannah-checkouts/non-gnu/avr-libc/user-manual/group__avr__string.html#ga5f60008005ea7557430149926cf583d7
And looks like an example here:
http://www.cplusplus.com/reference/clibrary/cstring/memcpy/