Hi Angel,
Your trip will be here before you know it!
Port Orleans Riverside is made up of groupings of buildings, and each group has their own pool. There is also a central pool on an island in the middle of the resort. You will not be too far from a pool!
Regarding being close to the lobby: In Alligator Bayou, the buildings closest to the lobby are buildings number 14, 15 or 18. If you have not already done so, I would recommend calling Disney reservations at 407-WDISNEY and indicating your preference on your reservation. These buildings will likely be 'preferred' location rooms (which cost a little extra). You do not need a doctors note for this. If you need a special room type, like a room that is easily accessible by wheelchair, make sure you mention this to the reservations department.
For additional information about Services for Guests with Disabilities at Walt Disney World Resort, please call:
General Information
Voice: (407) 824-4321
TTY: (407) 827-5141
Resort Reservations
Voice (407) W-DISNEY
TTY: (407) 939-7670
Angel, have a magical family time!