QuoteI need to eventually create labels and things to go on the terrain, but I'm having a tough time figuring out how to export more than just a camera in an FBX.
TG does not yet support FBX objects, so that is why it is not working for you, if that is what you meant. THey say they plan to support it in the future.
I probably totally misunderstand you, but...
I think what you are asking about, that you want to look into is "Object sequencing" Or move each object on its own (which would be a lot of work)
Also, I may be wrong, or it may have changed, but TG nulls do not and are not the same as nulls in other 3D programs. If I remember right from my own posted questions. From my use of after effects, I thought I could use a TG null as a control, but it does not work that way in TG. There is no parenting in TG.
You are asking a lot of really advanced questions, so it may be a bit before some who knows sees this. What you are doing is not "typical".
But I think if you search "Object sequence" you will find at least some of the answers you are after.
Cheers