I was told last year that fishing is permitted at Hourglass Lake as long as you don't fish from the bridge and as long as you practice 100% catch & release. I was certainly not the only one fishing there.
Fishing is allowed at Fort Wilderness. Fishing is also allowed from the deck at Port Orléans. Again, catch & release is required. You can rent cane poles at the island, but I'll pass since I keep about $1700 worth of fishing gear in my Jeep. It is my understanding that there are other areas where fishing is allowed, without having to pay the excursion fee. I'm sure I'm not the only dad who takes advantage of it...