I shouldn't have read this before going to bed last night. I had nightmares..
Yellowjackets are the meanest little buggers in the bee/wasp family..
They will be anywhere they can build a hole....in the ground or in the house. We had to call the exterminators out more than once..... They built a hole around our patio and another time in the pipes of our chain link fence gate.
I'm a bee-a-phobic..
I'm glad you're better..