From Legairre’s post on the sign-up page:
Here are parking details below
The list of people that you sent me will drive to the XL Center parking garage, entrance is across from Rocking Horse Saloon on Ann Uccello. There is a guard at the bottom of the ramp, they will get a sticker from them. From there they go up the ramp back on to Ann Uccello and take a right to park in the Church Street Parking Garage. They need to show the attendant there the prepaid sticker to get in for free. They keep the pass in their car and then on their way out they can give it to the attendant to leave. If they park on the third floor of the garage there is a sky bridge that will bring them right into the XL Center Atrium where I can meet them to then bring them down to their spot. If they have any issues they can call me 518-744-0260.