Is it possible to join alone via the Survey but then be placed with others that joined alone into a team to work together with a mentor for the actual Jam?

If so how do we go about achieving this?

I am wondering about this too

You can sign-up for the survey without a team and then use these forums and the IGDA Discord to find team members. Once you find team-mates, just sign-up again for a mentor through the form. 

The sign-up form will remain active throughout the jam, but we cannot promise mentors to teams who sign-up after today. 

You can sign-up for the survey without a team and then use these forums and the IGDA Discord to find team members. Once you find team-mates, just sign-up again for a mentor through the form. 

OK that's great. We have done this.