We'll be taking our 20 month old to Disney in March, and I'm wondering if I should purchase a stroller bag and/or stroller rain cover for our Britax B-Agile stroller? We'll gate-check the stroller, and I've heard this can be really hard on strollers. The B-Agile bag costs $35 on Amazon, which seems a little expensive, but I'm thinking probably worth it to protect it from damage. Do you agree? Also, the rain cover for the B-Agile is $32.50, which seems really high to me. Would it work to just use a large poncho? What do others do? Thanks for your help!