I have never been bass fishing anywhere.
However from what little I have heard about it at WDW is Bay Lake is a catch and release lake, and is suppose to be a great spot for bass fishing.
I found this on the Disney web site under recreation/fishing:
Catch-and-release fishing on excursions and dockside fishing are available at select Disney Resort marinas throughout Walt Disney World Resort. Enjoy a 2 hour private excursion or simply fish the old-fashioned way, dockside.
Fishing Excursions
Cast out your line and reel in the fun on a 2-hour fishing excursion on the lakes of Walt Disney World Resort. Embark on a guided bass fishing excursionavailable year-roundwith up to 4 friends aboard a 21-foot Tracker pontoon boat.
All Walt Disney World Resort Guided Fishing Excursions include:
An experienced guide
Rod and reel
Tackle
Artificial and live bait
Beverages (Guests may not bring beverages, food or coolers aboard)
One year BASS (Bass Anglers Sportsman Society) membership, which includes 11 issues of Bassmaster Magazine (One membership per excursion)
Fishing Excursion times and prices:
7:00 a.m. - $260
10:00 a.m. - $260
1:30 p.m. - $230 (for solo fishers)
Extended excursions are also available (additional fees apply).
Fishing Excursions take place along the following Walt Disney World Resort waterways:
Bay Lake
Seven Seas Lagoon
Village Lake
Crescent Lake
World Showcase Lagoon
Guided Fishing Excursions are available at the following marinas:
The Cabins at Disney's Fort Wilderness Resort
The Campsites at Disney's Fort Wilderness Resort
Disney's BoardWalk Resort
Disney's Caribbean Beach Resort
Disney's Coronado Springs Resort
Disney's Contemporary Resort
Disney's Coronado Springs Resort
Disney's Grand Floridian Resort and Spa
Disney's Old Key West Resort
Disney's Polynesian Resort
Disney's Port Orleans Resort - Riverside
Disney's Saratoga Springs Resort and Spa
Disney's Wilderness Lodge
Disney's Yacht Club Resort
Downtown Disney® Marketplace
Call (407) 939-BASS or (407) 939-2277 to make a reservation or simply book Your Fishing Excursion online now and a Fishing Coordinator will contact you in 12 - 24 hours.
Dockside Fishing
For a more casual fishing environment, Dockside Fishing at Walt Disney World Resort is also availablewithout advance reservationsat the following Resort locations:
The Cabins at Disney's Fort Wilderness Resort
The Campsites at Disney's Fort Wilderness Resort
Disney's Port Orleans Resort - Riverside