Is your battery running out at the Park? We recommend this charger, it charge your phone 6-8 times (full charges), it is amazing http://amzn.to/vEV5VF (MW benefits if you purchase)
I guess I better start packing for DL! If any of you CA locals will be at the parks this weekend or next week, let me know and we can try to meet up! Have a great day everyone.