Clamato juice!?!?! Are you guys serious or delirious? Or both? There is something completely wrong about that. A proper Bloody Mary does not have mollusk juice in it...
Try this one...To a liter bottle of V-8 or Spicy V-8 add...
1-TBS Horse Radish
1-TBS Worcestershire Sauce
2-TSP fresh ground black pepper
1-TSP Celery Salt
2-Garlic Cloves...(minced.crushed)
Juice of 1/2 lemon
If using Spicy V-8 add 1 TSP Chipotle Powder or other hot pepper powder
If using regular V-8 add 2TSP of above powder
Adjust any/all of the ingredients to suit your taste, and stay away from fish juice!

Also, in case anybody is interested...tequila is easily substituted for vodka to make a Bloody Margarita. I've had to do this for at least 2 reasons...#1 There was no vodka but there was tequila. #2 The woman I was with became very depressing if she drank vodka...so, tequila it was!

Mike