Nah, you can wing it. You could also play the team newbie.
As a back up team, SG-13 needs to cover the following bases:
Precision Takedown. Short range & long distance are both useful for taking out sentries, guards and bushwackers.
Transportation. In most cases, this means piloting someone else's vehicle such as a deathglider or tel'tak.
Technology. Hotwiring alien vehicles, working out how to put the gizmo into reverse, computers, etc.
Cultures. What are the natives saying and doing. Is that Asgard or Furling graffiti?
Medicine. It's really really easy to get horribly hurt.
Infiltration. Break and enter, assassination.
Recon. Where is everyone and what happened here?
Fire Support. Let's rock & roll.
New Drive focus: Space vessel, Goa'uld.
Covers: All non-glider vessels of goa'uld manufacture.
New Drive focus: Space vessel, performance.
Covers: Deathgliders & 302s.