As Ryan mentioned in an email to another list a couple weeks ago:
Everyone with access to create svn accounts can also link them to Labs accounts. Feel free to make Labs accounts. Also feel free to add users to the bastion project, and to any other project you are a member of. Unless the user needs/wants Labs access, don't give them bastion or other project access by default, though.
It seems to me that the list of people who can make SVN accounts is unclear to the average newbie -- https://meta.wikimedia.org/wiki/System_administrators doesn't have me on it. Is there a better list?
How to make a Labs account: https://wikitech.wikimedia.org/view/OpenStack#Wiki_access which I am about to merge into https://labsconsole.wikimedia.org/wiki/Help:Access .