As is most often the case, the answer is a definite "Yes and no."
Ranch Rescue has come in as an outside organization with a devil-may-care attitude to their opposition. That sets them up as confrontational and reduces their effectiveness. They are, however, working with the local Sherrif and have had some benefit in the area.
American Border Patrol is Glen Spencer's outfit here in Arizona. They are a small core of outsiders who have enlisted the assistance of locals to spot and report illegal crossings using high tech gear. ABP has been very effective in their efforts. If you followed any of Jackelope Breeder's comments, you'll remember seeing a claim that he has been responsible for spotting (and having the BCBP apprehend) several thousand illegals last year. I would suggest he is being modest.
OBTW, the Bureau of Customs/Border Patrol (BCBP) officially apprehended (in the Tucson sector) over 15,000 illegals in the month of December. Their conservative estimate is that 4 out of 5 get away. Crunch them numbers...