We went to the Admitted Students Day in March. It was well done. You have a chance in April to have gorgeous weather and flowering trees!
My advice: drive in main entrance, go past “M” circle, go up hill and drop your son off at the Stamp Union. There was a cute welcome line with some band members, cheerleaders, balloons, etc!
The day is busy and I advise getting a campus map head of time, and planning your schedule. We didn’t and my DD wanted to see many things. We logged 15,000 steps!
Also, eat in the cafeteria, they give you a discount coupon.
Have fun! My DD will be attending UMD in the fall.