1998 Dodge Caravan Diesel Fuel in Gas Tank

We had approx 2 gallons of Diesel Fuel put into a full tank of high test gas (20 gallon tank). The car was driven approx 12 miles and then shut off and not re-started. My question: Is the Diesel Fuel thinned out enough as not to harm the engine if driven? Will it gum up or hurt the engine/injectors if driven? And is there a way to drain/suck out the fuel and refill it with reg gas? I prepairing for a long maintenance week-end, please help.

Thanks, Gordon