Side view. The Berm seating at Walker Stadium is general admission lawn seating in the right-field (RF) and left-field (LF) corners, with no assigned seats â itâs first come, first served. Attendees can bring camping or lawn chairs, or blankets to sit on. July 3rd is a special theme night. Walker Stadium in Portland will host âDill-ie Nelson Night + Rockinâ the Walkâ with the Portland Pickles, featuring âoutlaw pickle energyâ and a Willie-inspired celebration.