Safety at Big Bend National Park

Hey Folks, if everything works out (you know what I mean), my daugher and son in law and my wife and I will be taking our RV's to Rio Grande Village BBNP in March. We were discussing today, what the weather might be from March 9 thru the 14th? And suggestions? Also when is a good time for the Bluebonnets there? We have heard Texas size stories of Texas size Bluebonnets. First time for all of us. I have traveled Texas in all corners except the BB area. Also we are not to concerned about the safety factor, but we had heard that there was an uptick in activity? With all the drama today, this may be an embellishment. Any suggestion or comments to our questions above would be so greatly appreciated.