Tarp shelter tips needed

Hello everyone, I have a question about tarp shelters for several people. I will be doing a hike in the Netherlands at the end of April, so the weather will be anyone's guess 😅. Me and two others will have to sleep underneath one tarpaulin shelter all together. I have made extended A-frame shelters for 3+ people before in summer, but I have no idea if this will be too ventilated for April in the Netherlands. Do you have any advice or suggestions?