I've got the OnX maps on my phone, but I have no experience with the Garmin chip. I'm going to Wyoming and trying to figure out if I need the chip, or if my iPhone OnX app will provide the same information. I'm going to a limited public land access unit, so I need the best road and landowner information possible, but I'd like to avoid the GPS if the information on the chip is redundant compare to what is on my phone. Does anyone have experience and can tell me how the app and the chip differ (even better if it is Wyoming specific)? Thanks