I can't recommend an App but I can explain how I handle it. I always look for double dtack five in pumps and go to the far right. If I pull in and find I can't get to the pump I need a simply swing wide and drive on out to another station. I do like to plan ahead and look at aerial views but can't always tell from that. I have a 500 mile range and begin looking for a station at about 300 miles. Using this method I have never gotten stuck needing to disconnect the toad.
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