The best thing to do is avoid the brokers all together and work directly with land owners. Brokers increase the price to pocket money and to be very honest, it is hard to find a good one.
+1. I know several guys who are lease brokers on the side. Most of them are nice guys.
But I hear many more bad stories than good from the hunters they put on various leases. My thinking is:
1)most knowledgeable owners with good places don't need a middleman; and 2)most lease brokers are motivated to "upsell" any place to get the deals done.