Generally clients do not attend ALR hearings. You can, but there is really not much point in it. Your attorney will have already reviewed the offense report and will know what s/he wants to get out of the officer. (Remember, the ALR hearing is limited to narrow questions about the stop, the observations which led to believe you were intoxicated and your refusal to take or your failing of the BT. Many judges super restrict cross at these hearings.) You should do what your lawyer tells you to do.
If you have an attorney, 1) ask your attorney this question and trust their answer and 2) let your attorney do the work of questioning the officer. That is what you are paying him/her for. I understand wanting to be involved however you hired an attorney for a reason so trust him/her.