This will not be a problem. The terminals where you check in and wait before you board are arranged where you will never lose sight of your group.
Their Sail and Sign cards will be pulled and taken to the VIP Check In location. Your Sail and Sign card will be at another location.
Just separate to check in (again you will not lose visual for long) and then walk onto the ship together.
When our family of 4, who are all Platinum (VIP) went to New Orleans and took 2 dear friends (who are not). We parted ways at Security, each checked in where we were suppose to and ended up sitting almost right next to each other waiting to board...although ours was in the roped off VIP section and they were not.
We both followed the normal procedures and they literally walked onto the ship right behind us.