Town Lake in Prosper is WAY overfished. There are WAY too many yakkers out there on any given day and the fish are much harder to catch now that they've had everything in the book thrown at them multiple times. This is only a 30 acre lake and I've seen as many as 13 yaks out there during the day. Give the place a rest for awhile.
I know what you mean it does get hit hard I've never seen that many kayaks out there but it gets a ton of pressure but then so does Bethany Lakes in Allen. I've been to Prosper maybe 6 or 7 times at the most. I got like 4 small bass to show for it. Its a fun paddle though but not on my top ten list I have much better places to take the kayak.