Here since you are pro se call the lawyer and ask.No need to play games on this, tell them what witnesses you have, see if there are any facts you can stipulate to or exhibits ahead to time.You can presubmit your exhibits to the lawyer and ask for his as well.These are the kinds of things a lawyer would do.You want to scout the enemy here, see what you can find out, what things if any you can stipulate too.Also any documents you can agree to submit together again would shorten the hearing.
Do not be afraid of talking to the lawyer, they are supposed to try and see what can be agreed to, whether it be witnesses or documents or anything else.If you have an offer of settlement make it or ask them if they have one.Again your lawyer would do that since you are pro se you can do this.The lawyer is allowed under the rules to talk to you personally since you are pro se, any settlement discussions are generally not admissible.
It is always good strategy to try to get the other lawyer talking, see what can be agreed to, what points of disagreement here and what witnesses they have.This is good lawyering to do so.
If there is no scheduling order with witness, exhibit deadlines, then calling is the simplest thing to do.Kill them with kindness and besides the other side has to pay their lawyer.The longer you talk the more they have to pay.That alone might make them more agreeable to settle.
I have practiced this strategy for the last 30 years, helps you avoid surprises and plan more.
Write out your statement here--your opening in case you get nervous.Also you can read the statement into the record under oath as a witness, this makes sure you don't forget what to say.Also if there is a child involved the key is best interests of the child and why your presentation meets that test here.
I appreciate the chance to help.Let me know if you have more followup.Thanks again.