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A back of the hand calculation indicates that the 225 mile trip over 3.5 hours with a couple 150 lb passengers will eat up about 395 kw-hr. I don't expect anyone is going to hand you that electricity for free. There will be metered outlets where you can connect and pay the cost of the electricity. That electricity is going to be priced according to what the local utility charges per kw-hr plus a service fee for allowing you to occupy and use the charging equipment. "
Here in Kalifornia, there are several 'electric vehicle charging stations", mostly relics of the old lease-only GM electric car in the 1990's. The stations are still here and it's still free to the user.