Dear Kayla,
Thank you for visiting the
Disney Parks Moms Panel with your question! It's great to hear you will be
visiting with your little girls! Renting a stroller at the Parks is super simple! Once you've been all cleared by security, you stop by the stroller rental shop and request your double stroller.
In regard to your question, let me give you some great news, if you are park hopping, you do not need to pay again at the second or their park your visit! You can simply show the Cast Member your voucher, and you will immediately be given one at the next park.
Mom Tip: Even though this may not occur often, I recommend you arrive early as it is not possible to reserve a stroller in advance, and the limited number of them, may deplete at one point on crowded days.
Kayla, I hope you find this answer useful and please come back with more questions.
Have an awesome trip!
~Desiree