It takes no more work or time to get good wood than it takes to get the other type. So I would naturally be inclined to take the locust.
However, there might be more to it that this. Perhaps by cleaning up the poplar for them you might get more good wood in the future plus you would be doing a good deed. Poplar can be burned and in many places that is their main source of wood. It might smell a bit when cutting and will be wet but it will also dry fast and get rid of the smell. It also splits easy and can make good kindling. It also can be burned to your advantage during those times when you do not want lots of heat or even during the winter time during the daylight hours.
I would not expect it to give you coals (it won't) and you may get a few more ashes for the same amount of heat, but it will burn and give you heat; just won't give heat for as long as locust will. And again, because this is in a cemetery, you might be doing a good deed. For example, I tore down an old building in a local cemetery last summer and took anything that was salvageable. Then we buried what was left. This cemetery is owned by our township and they were very thankful for the assistance as otherwise they would have had to hire this all done. So it helped the whole township.
However, there might be more to it that this. Perhaps by cleaning up the poplar for them you might get more good wood in the future plus you would be doing a good deed. Poplar can be burned and in many places that is their main source of wood. It might smell a bit when cutting and will be wet but it will also dry fast and get rid of the smell. It also splits easy and can make good kindling. It also can be burned to your advantage during those times when you do not want lots of heat or even during the winter time during the daylight hours.
I would not expect it to give you coals (it won't) and you may get a few more ashes for the same amount of heat, but it will burn and give you heat; just won't give heat for as long as locust will. And again, because this is in a cemetery, you might be doing a good deed. For example, I tore down an old building in a local cemetery last summer and took anything that was salvageable. Then we buried what was left. This cemetery is owned by our township and they were very thankful for the assistance as otherwise they would have had to hire this all done. So it helped the whole township.