I suggest you go to the court . If you do not go and pay the fine your insurance will go up for 3 years. If you go to court, Almost all the time you have to see district attorney before going to judge. And for almost all speeding cases  he will reduce the charge so that people will plead guilty and that saves time of court.

You drove 11 miles above the speed limit, he will likely reduce it to 5-6 miles. that means you will be charged for speeding at 75 -76 in 70 zone. Ask your insurance agent about insurance point i.e. at how many miles over the speed limit your insurance will go up. If it looks good plead guilty if not ask DA whether he can reduce further down.