And it should be pointed out, many many of these hunters who don't do well are limited ont eh hunt days..they try and get out there just on Sat or Sun morning and then are disappointed when they only kill 3 ducks on a bluebird day...and then don't stay late enough for the later flight of big ducks (if it exists in that area). I kill many a pintail after 9 am, hell after 10 on certain days.
Rice fields have weather/days that are better than others, just like any other places. SOme have enough money to have the blind just sitting there during the week but at least have a place for them to pass time on weekends, so they keep the blind....the ducks don't wait though
You have to get em when they are there just like any other game.
Many rice field type blinds are position geographically to where they produce better in the evenings.
That's why I urge prospective hunters to talk to locals who know, not the guys who didn't hunt the blind correctly or enough to know. The farmers all help and want you to kill as much as possible, most of them anyway. if you don't know how to set up for specs, go on a guided hunt and learn that art. It more than makes up for slow ducks when you can each bag a couple of specs!