Add items to context in a UDStep

Product: PowerShell Universal
Version: 3.4

I have a fairly complex stepper routine. As part of it, I gather some info, but also, based upon the inputs create a large number of variables. Right now, I know I can add to the context ($EventData.context) with things such as textboxes, etc… Is there any other way I can add items to this without using textboxes? I need to be able to pass these items along from one step to the next step and this seems like the best way to acomplish this.