I brought blankets and pillows, and found a spot in the back or side of the Church, if it would be needed.
The first Pascha, when my oldest was 11 months, he sat in his car seat the entire service (except I think the procession I carried him). Awake. But we were where he could see everything (up in the balcony). And that was with Archbishop Job serving IIRC, so it went for five hours or more.