Why in hell would you have to hike, when a mule can pick you up 50’ from the river and drive you anywhere you want to go?
Boquillas has been a major crossing point for years. Smugglers and mules are nothing new.
If someone wants to cross the Rio Grande there all they need to do is walk across, just as they have done for hundreds of years. This unmanned border crossing will not increase illegal alien crossing.