If your husband also has an AP you could use that for discounts/parking, and if you purchase MP then you can pull FP through the app as well as use the app for entering the park. So technically you might be able to get through the trip without the card, then you can take your time searching for it before your next trip. However, MP is $10/day, so if you weren't planning on getting it in the first place and you're going for more than two days, then it would actually be cheaper to just replace the card. At the very least, you can use the app to enter the parks and enjoy the quiet morning hours, and then go to guest services later in the day when it's convenient.