In a large pot or dutch oven, fry bacon slices over medium-high heat, stirring occasionally, until crisp, around 8-10. Use a slotted spoon to remove to drain on paper towels, reserving 2 tablespoons bacon grease in Dutch oven.
Add butter to the drippings along with celery, onion, and red bell pepper. Cook over medium-high heat stirring occasionally, until slightly softened, about 4 minutes. Add minced garlic, cook for 1 minute longer.
To the pot add the flour, seasoned salt, old bay seasoning and black pepper, stir until the vegetables are coated. Cook for 1 minute over medium just until absorbed.
Whisk in seafood stock. Add potatoes, corn and bay leaf. Bring to a boil over high. Immediately reduce heat to low; simmer with the lid offset stirring occasionally, until flavors meld and the potatoes are fork tender, about 15-20 minutes.
Gently stir in crabmeat, milk and heavy cream. Cook over medium stirring often, until crab is heated through, about 5-10 minutes. Remove bay leaf and stir in parsley, reserving some for garnishing.
Divide chowder evenly among bowls. Garnish with crispy bacon and additional parsley. Seve with oyster crackers.