Student Group "Promotion"

I'm part of a student group at my university and it seems that in the fall I'll probably be getting a "promotion".

The group's goal is to produce a product to take to a competition in June. This year we managed to get first place, which was fairly convenient ;) The group is made up of a few sub-teams, say Mechanical, Electrical, "Software A", and "Software B". This year I started as a member of the Software A team and was working under a team leader. Near June, he had other responsibilities and so I took over as the "Software A Guy" (I was the only person left on the "team"), including travelling to the competition. The "Software B Guy" was mostly solo on his sub-team, but he did great work and was one of the reasons for our success this year.

The issue is that most of the people on the team graduated at the end of the last school year, so they're not going to be here in the fall. I, on the other hand, am starting my third year, so I'm going to be here for a bit longer. After the competition, we were talking about things and it seems like I'm next year's Software B Guy. So, either in an application (Software B has some hairy math!) or administrative (he was also the group's treasurer, for example) context, it seems like I have some learning to do ;)

In any event, if I do end up being in charge of "Software B" (or staying with "Software A") this year, I'll probably have a team of 0-3 people to work with (depending on how many show up at the initial meeting and how many actually stay ;)). Does anyone have any advice for this sort of situation?

If there is any anxiety about this, it seems to be because the new people are going to be just that new. The people on the team this year were excellent and I learned a lot from participating. I just hope that we can get good people this year, as well. Maybe I can sit across from the people who come to our first Meeting For Interested People™, and do the Trump Cobra if they seem frumpy ;)