Unfortunately, no. Only the people listed on the RSVP form can attend the wedding.
Where should I park?
The HarMac has a designated parking lot towards the back of the building. Turn left into the parking lot from 6th Ave SE if coming from 5th St SE. Turn right into the parking lot if coming from 3rd St SE. Once you've parked, walk up the ramp along the side of the building to enter.