Hiya Alejandra!
So nice to see you again! Napping in the the parks can always be tricky, and while you can find quiet places
to nap, there really places to take a nap in the park.
If your kids nap great in the stroller, that's a bonus! We'd often walk around until they were out, and then find a quiet area and 'stroller sit' while the other parent entertained the other child/children. A great option for a quiet place could be the awesome
Baby Care Centers. If you catch them during a non-peak feeding time, you might be able to hang out with your 2 year old while they nap there. Otherwise, it's stroller naps.
If at all possible, I can't stress the difference a hotel nap can make. If you are staying on property and can make it back to your Walt Disney World Resort hotel room--by all means, do so! There's something about an actual nap that just can't be substituted, and if you're expecting them to pull a late night, there's really no substitute for a real nap!
Have a magical vacation!
Amanda