Parking will depend on when you're coming up. Classes started today so the lot is full up right now. Here is a link to the course map and info:http://www.stmary.edu/recreation/Disc_Golf.pdf
I need to remark some of the holes so you will have to have this map until I do and then you may have to guess where I intended the tee box to be. But the map is accurate. The best spot to park for #1 as you can see from the map would be in the parking lot in front of Maria Hall. But that's a dorm and the lot will likely be full. So, behind Miege or next to DePaul are visible on the map and will be the next most likely spots to park.
USM is easy to find. It's just west of 4th Street Trafficway (K7) across the street from the VA Hospital. Take the North cobblestone entrance off of 4th and you will see baskets on the way up the drive which will come up right in front of Maria Hall. If I'm available when you get up here I'll be happy to meet you and give you a quick rundown of the course and depending on what time you get here might even be able to jump in and throw nine holes. Give me a call for more info 816-830-0974.