Did I read correctly somewhere that if one member of our party, there will be 10 of us in 4 cabins, is a VIP that we can all use the the VIP process if we check in together?
No. This is not normally allowed. First off, only the cruise cards for the VIPs will be at the VIP desk. Secondly, it isn't fair to the other VIPs trying to check-in if they have to wait because of others who haven't earned the privilege. The VIP needs to check in and then wait for the rest of you.