The best time to plan your trip is on a WEEKDAY. Casitas gets pounded non-stop especially in the spring. When you read the hit parade of 10+ fish every week, almost all of these fish are caught during the week. And they are usually caught by the same guys, week after week. The guys who throw the big baits and know the lake really well. Bed fish at Casitas get pounded, so unless you're lucky or you are good at spotting and fishing for deep fish, it's a crap shoot. If it was me, I'd go the first week in March! good luck. Casitas hates me, but it shows the love every once and a while.