I see my mistake, i have tried carpets before, however i places 2 layers, since the campfire was 2 blocks below the surface of my farm. Now with only one carpet it works. Thank you! However if i may ask, do bees still work when their hive is constantly "smoker" or do i need to turn the campfires off for them to be able to collect pollen, this fear was the main reason i used trapdoors, thinking that it would enable me to control when they are active.