Don,
There are no negatives to Wildlife Managment (1d1)!!! It is good for the land, good for the animals, and good for the soul. The program is protected forever by the State Consitution so it will never go away. You will get the same tax break as AG. Most importantly, Wildlife Management is under the authority of the Texas Parks and Wildlife Dept. -- NOT THE COUNTY YOU ARE IN!!! if they give you any grief, sick the wildlife biologist on them -- it is his baliwick. The link is
TPWD Wildlife Managment The Wildlife guys are very supportive and want you to succeed. You can also find the TPWD Wildlife Biologist from this link. We have been on it for two &1/2 years and all of our doe have had twins each spring since we changed the environment that existed before we purchased the place. The wildlife is really responding. Food plots are easy and fun to watch the results. The overall program is not hard and you would do most of it anyway. I encourage you to make the change over - do not have to wait until the end of the year. Best.