Tree stands work as do blinds or just sitting. Still hunting can be productive in some areas.
Hunting on base for deer is possible IF you have base access, ie. active duty or retired military, contractors, or DOD civilian or you’re a spouse or family member of such. Joe Schmo civilian can’t just go on base and hunt deer. The pheasant release program has different rules for civilians hunting on base. If you want to hunt deer on Whidbey, find a willing land owner and hunt private or join the orange army and hunt the limited public land.
The State is looking to start paying private land owners to allow hunting in order to reduce the deer herd. Keep your eyes open on the WDFW site to see if this comes through. Hopefully they post a list of properties that signed up.