You are probably ok on your time frame. How long they can stay in there is dependent on several factors, as is true with many questions about bees. Population, weather and resources being a few of the main factors dealing with answering your question. Swarms continue to amaze me at how quickly they can build. They build like their life depends on it. Because it does. Have you considered taking the lid off and see what they are doing? Another idea is lift up on the trap and see how heavy it feels.
There is a small slough right behind the trap, plenty of water and lots of trees weeds and grass all around the area. Plus a crawfish pond within 10 feet in front of the trap.
I was thinking about pulling the cover this afternoon but was to busy dealing with other stuff. I am sure I will be able to get to it by the middle of next week if life would quit getting in the way.
Do you have frames in that swarm box?
Depending on what you have in there, they could possibly be left alone another two weeks, it all depends on how much of a mess you dont mind cleaning up. If you have a box with no frames, they are drawing comb from the lid, and the longer you wait, the more of a chore it will be to cut them out. If you have frames with foundation, or preferably drawn foundation on a couple they will be fine right there for another month if they need to be.
Get a picture of the bees. It will be easier to identify what you have.
I have all 10 frames in the trap. Canter frame has a full sheet of wired small cell foundation,all others have unwired starter strips. I wish I had some drawn comb,but I don't.
I will see about getting a pic of the bees tomorrow. I should be able to run over there right quick between errands and a Dr. visit.
I still need to build some boardman feeders some top feeders and some entrance reducers.Also need to find time to go check my 2 other traps.
Man all of a sudden this retirement stuff is alot of work.