There's a guy on here from east county San Diego. I bet he'll chime in. I know he hunts.
I'm from San Diego and there is an endless supply of outdoor activities. Go to Mission Beach and ride the roller coaster. Then go across the street and get a Roberto's carne asada burrito. That's one of my little "Heavens". You can be in Julian (in the mountains) an hour later, rent a mountain bike and go trail riding.
I wish I knew of some archery stuff there. I was long gone before I got into it.
Have fun!