We bought 2 Skip Hop Saddlebags for our trip in September. They didn't match our stroller but were really cheap so I didn't mind! LOL For this trip we had brought along a Baby Jogger City Mini Single for our 2 yr old DD and had attached a Saddlebag on each side. I couldn't believe how roomy the Saddlebags were!!
We probably only needed one because we put lots in each but never got close to filling them. One side had a spare outfit, prob at least 4 diapers, pack of wipes, and snacks. The other side held a sippy cup, 2 juice boxes, plastic juice box holder, etc. Plus when needed we stuck in hair bows, autograph books and pens, etc.
The stroller folded up just fine with both on...never had to to remove them. But if you do want to take them off, they are just velcroed on and have a carry strap for easy carrying! I am so glad we had bought them and that they were such a good price because other wise I would have been to cheap to pay full price and would have missed out. LOL