AITA for checking my daughters' bags after my husband packed them?

My (36F) husband (39M) and I are going on a brief vacation with our daughters (twins, 5 yo). It's a fun trip, but an expensive one, and we're saving for a big vacation next year. <br><br>My husband packed my daughters' bags. When I asked what he put in there, he gave me a long list that included some toys, several shirts and shorts and swimsuits. That wasn't what was bothering me, though - it was that he also packed several dolls, a big stuffed dog, and their tablet. I asked him why he did that, and he said they would get bored on the plane. I said we can't take all that and we're saving for next year's trip, so bringing all that extra stuff is just added baggage fees for useless stuff we don't need that he could just have them share one tablet or something. He said I was making a big deal out of nothing and I could pay it if I was so worried about it. I told him fine, I was going to check the bags to make sure that nothing else "useless" was in them.<br><br>When I did, I found pictures of our house, including the inside, and a copy of our house keys. It was my husband's old trick for when he was a kid. He would do that when he went on a school trip so that if he got lost, he had the address and a key to get in. I was really upset. First, it was a copy of our HOUSE KEY why would he do that, second, what is he preparing for? He's never prepared for my daughters to get lost like that before, and why do he think they would need to get in the house on their own? When I asked him about it, he said that it's just in case and the pictures are so they know what to tell someone if they need help finding their way home. I told him that to me it seemed like he was preparing for something bad to happen. I asked what made him put the key in there and he just said "just in case". I said that's not okay, especially with our house key, and that there's no reason to be preparing for that. He said I was making a big deal over nothing.<br><br>Now he's angry that I don't trust him and I'm angry that he's doing things behind my back that I don't want him to do.