Here is a link to the facebook even for the "Texas segment" and event description below:
https://www.facebook.com/events/1549791575297024/
"Come and walk both sides of the line with us as we flex our rights and educate the public about the current law in Texas and how it compares to Arkansas as well as many other states and what we plan to change about it! CJ Grisham, the president and founder of OCT will also be in attendance. Come and meet the spark that ignited a wildfire in the push for more gun rights and liberty for Texans! We will be meeting in the parking area between Fuzzy's Tacos and Wing stop on the Texas side. After we are finished in Texas we will cross into Arkansas to exercise a right denied to us by the state of Texas. We will be carrying modern handguns openly under Arkansas's constitutional carry law Act 746, no licence required. This is a can't miss two state event! Be there!
***Long guns and black powder revolvers only in Texas, firearms must be slung or holstered at all times with no rounds in the chamber***
***Modern handguns only in Arkansas, must be in a holster***
***You are not required to be armed to attend***
***This is a family friendly event, feel free to bring your spouse and kids***"
I think that the Texas side stuff and the Arkansas side stuff are being done as "separate" events (i.e. OCT is not officially "running" the Arkansas side event) but I don't think there is a facebook event page or description specifically for the Arkansas side segment currently. The description above pretty much covers everything though.
Edit: The roads at this location are neat. This is the intersection of State Line Ave, which runs down the actual state line between Texas and Arkansas, and Texas/Arkansas Blvd which is, of course, named Texas Blvd on the Texas side and changes to Arkansas Blvd as you cross State Line.