Child Sleep Issues: Infant, Pack n Play

Pack N Play Mattress?

Hello! My son is just over a year and we are planning a beach house trip this summer. We want to bring the Pack N Play for him to sleep in, but the pad is so thin and uncomfortable. He is old enough now where I don't worry as much about SIDS. Does anyone know of a mattress that thicker or any ideas on how to make it more comfortable? Thank you, D.