To go from Wilmington to Newark you will probably use DART bus
Route 16
(an EXPRESS which only runs on weekdays).
Slower alternatives are
Route 6 or
Route 33, which also run on Saturdays.
DART can be reached at (302)655-3381.
In Newark, try to get out as close as possible to the junction of Main
Street and S. College Avenue. If that fails, the bus will automatically
stop near the Municipal Building at the Elkton Road/Apple Road junction,
which is a 5-minutes walk from the Trabant University Center
(see the
campus map).
A final note for people from Philadelphia: SEPTA Route R2 also runs to Wilmington.