Add URL Parameters in Addition to Khoros Tracking to Links in Email Templates

If we have an email with our community URL in an email template like so:

https://community.ourcommunity.com/

Then when the email is sent a tracking query parameter is added on like so:

https://community.ourcommunity.com/?emcs_t=S2h8ZW1haWx8cmFua19jaGFuZ2VfbWVzc2FnZV9kZWZhdWx0fExDVVdDN1lHSDBCV1lQfC0xfE9USEVSU3xoSw

What happens if I add my own tracking query parameter like this in the template?

https://community.ourcommunity.com/?google_analytics_blah_blah

Is it smart enough to tack on with an "&" or is it going to break the tracking? I guess I can test it out but wanted to see if anyone else had experience with this.

Also, I know we had to ask support to turn on email metrics. Is that where these come from and would having it turned back off remove them?

Thanks!