Max it out. Worst case scenario is you don't need any of the money (none of your 11 kids go to school), you've filled the RESP accounts including all the grant money and I think (you may want to double check) that if there's money left over, the portion that was your contribution plus any investment gains on your money just come back to you like a normal taxable account. The grant money and gains get donated to a post secondary institution of your choice. I'm like 51% confident on that but I think that's what the bank lady told me way back in the day.
"Masked Bandit is a gateway drug for frugal spending." - Unknown303