Yes, that's right. Guest services will give you plastic cards for those tickets. Depending on the officiousness quotient of the CM who assists you, they might want to link the cards to profiles on your account for you -- since those tickets are not transferable. They might not want you to walk away and link them later.
Are there names written on your paper tickets? If so, your phantom names will need to match. And remember that once linked, partially used tickets *cannot* be reassigned. So if they are mistakenly linked to your own real profiles, there will be no SDFP with those cloned cards. Possibly set up a separate
MDE - and don't make a mistake and give the CM the wrong email address!

Don't trust anyone to do this for you - do it yourself, with a list of instructions for yourself to avoid error. Be sure that they give you an adult ticket in place of former child tickets - since a child in 2005 could be over 18 now. Ask for this. Even if the original user is still under 18.