I would see what my assignment was and keep that in my mind as I work. Presumably there will be others doing their tasks and supervisors, etc. This is not home and your mother is not there supervising and making sure you do all the stuff she wants done, perfectly. I have been there, had that mother! (or perhaps the opposite where no one did anything in your family and you felt you had to do it all). This is not "your" conference and you are not in charge or culpable for how it goes, what is/is not done. Just because you love to be helpful and understand how the conference "works" because you are working it as well as attending, does not mean you have to jump up and satisfy everyone else's wishes -- run down the hall and tell "Susie-Q" that a guy you just talked to wants. . . . in her purview.

I guess, were I you, I would make myself a piece of paper with three columns on it; (1) my assigned tasks, (2) what I personally want from the conference as an attendee (3) how I would expect to be attended if I were a full-pay attendee instead of worker. I would be careful to not be more "eager" than I would expect of another. Friendly and helpful maybe but not eager :-) Learn what other people are assigned and their names, etc. and send people to see them instead of taking people there or doing it yourself or whatever. If people say, "Can you. . ." apologize and explain it is not where/what you are supposed to be doing and tell them how they can find the right person but don't over-explain what that person will do for them or what their job is, etc., just send them in the right direction. You don't have to get them across town when they are lost, just out of your neighborhood to the next policeman on the corner who can give them the next set of directions forward