The only store on Coinpayments that takes UTC for Giftcards is:
http://www.amazetreats.com/catalog/and they only seem to have Starbucks, Amazon, Target & ITunes Giftcards?
Or better yet take the donations in UTC, and use
https://www.coinpayments.net/ to buy giftcards to fund the trip. Anything other than taking BTC directly that just seems like crypto-adultery to me lol.