Luggage and bags:
Possibly no bags except for your camera!
Clothing/Shoes/Weather Gear: What you like! Just to feel comfortable and relaxing!
Photo Equipment: The best you have - water and shock - resistant if possible :-))).
Miscellaneous: Do you want the whole list? OK, my top 5:
1. Good humour :-)
2. Good humour :-)
3. Good humour :-)
4. Good humour :-)
5. Postcards (local and/or funny), coloured pencils: red = love, black = respect :-), address notebook!
Oceanside is right at the Pacific Ocean so it is usually cooler in this area even during the summer months. Bring clothes that can be layered and a jacket or sweater for the times that the breeze run cool and after the sun goes down.
Photo Equipment: Oceanside is not really a tourist spot but there are lots of photo opts, so bring your camera along to capture some of the pretty and interesting sites, especially at the Harbor.