Am I able to print any of my own family names for ordinances in the temple? I'm visiting from out of town and forgot to bring them

You should be able to ask the worker at the front desk to print them out.

The Take a name app will be able to print there also...

You can bring in the Family Search app and the ordinance ready section will generate a barcode for you to take to the office to have them print your cards.

I think you can do it at any temple