Airstream purposely bent the flooring bolts to prevent them from working loose. They knew these coaches were/are going to last! So you will have too cut, break or drill them out. On mine where the floor rotted the old ply was easy to pull up over the bolts. Now along the outer wall the bolts go though the body C-channel, through the ply floor and through the outriggers and or frame. You will have to remove the inner skin to get at them or create access panels that can be patched later. I would use access panels where they will be hidden in closets or behind cabinets.
Neil and Lynn Holman
Kirk Creek, Big Sur, Ca. coast.
1966 Trade Wind
1971 Buick Centurion convertible
1969 Oldsmobile Ninety Eight