Hi Courtney! Welcome to the Disney Parks Moms Panel.
I can totally relate to having to figure out what is the best stroller for three small children!
I personally usually bring one lightweight stroller from home (we have a McLaren) and then I rent a double stroller from an outside stroller company. If you have a double stroller at home and are comfortable bringing that with you as well to save some money than that would be ok too! The Walt Disney World Resort does have strollers available for rent but they are based on availability, they are hard plastic, and they do not recline. When I rent that double stroller I use a company called Kingdom Strollers. These strollers are very roomy, they recline, and they have an amazing shade to protect that precious skin from the sun. They are delivered right to your resort (stored at Bell Services) and they will be picked up from your resort on the last day of your stay. They are cleaned in between each use and I love that I don’t have to rent/make a return of a stroller every day. They fold up really easy and I think that the pricing is very reasonable. Keep in mind when using the
Complementary Resort Transportation, strollers have to be completely folded.
Traveling with three small children can be a bit overwhelming so make sure to use the Baby Care Centers located in each of the Theme Parks. These are a lifesaver for me. They are air conditioned in the hot months and warm in the winter months. They have private areas for feeding, full sized changing tables, and an area for kids to just relax and watch TV. You also can purchase baby supplies and they even have a kitchen area. It is a wonderful place to regroup especially on those hot days.
I hope that you have a magical family vacation!
~Heather~