No good camping near border at Tijuana. Places for huge motorhomes perhaps and motels.

Best to plan arrival at the border before Noon. Little traffic then. Right at the border itself you will see some big building on your right. These are Migracion and Aduana. You can pull over any where there, walk in and get your Tourist Visa. Note:
As you approach the actual border ... you will see guards but they won't stop you, only wave you through. You need to stop
right there, pull over and say "MIGRACION" They will point the way.

You can also get your TVIP if you'd like ... or you can wait until La Paz Ferry terminal to get it instead .... BUT ... you must get your tourist visa at the border even though NO ONE will tell you this and NO ONE will stop you, ever, for anything or ask for your Visa. (not required until 200 miles South) It's an open border and they like to keep traffic moving so you have to stop on your own and go get your Visa.

Getting the Tourist Visa takes about 10 minutes, the TVIP about an hour.

Once back on the bike, follow signs to Ensenada. In about 4 miles the road opens up and clears out. You will be riding along cliffs over the ocean. Most Motels are expensive along here but cheaper available in Ensenada inland from the tourist area.

About 1.5 hour ride from TJ to Ensenada. Toll road. Free road is a pain. Pay the tolls. (5 stops ... bring coins ... US or Mex) You should have plenty of time to find a Motel if you cross before Noon. There can wild camping in few places on the beach ... but I DO NOT recommend it here. Further South, much safer. You decide.

If you choose to stay on USA side you'll spend 4 times $$ for a room and wild camping will be HARD TO FIND unless you go 30 miles inland on the back roads along the US/Mex border. Use caution. This is now a seriously MILITARIZED ZONE.
Border cops everywhere .... and they'll treat you like a Guantanamo prisoner.
Most are X military and totally damaged goods.

Once you're in Mexico ... all this crap disappears. You will be safe if you use common sense .... and smile.
Mexico is a delight in every way.