Welcome!
You can remove your tub but you’ll have to disconnect the drain first, probably under the trailer. Airstreams are built from the back to the front to the bathroom goes on first followed by everything else. It’s difficult to take things apart in a different order than they went together.
You can piece together a new floor by making g cleats to connect the pieces but you also have to attach the floor to the walls and frame. On my ‘77, bolts go through the channel at the base of the wall, through the floor and through the frame so you have to take the inside walls and banana wraps off to properly connect everything. I’m sure someone will respond with how the earlier trailers are built.
You may also find soft or rotten frame when you take the floor off, I had to do some welding on my frame before putting my bathroom back together.
Good luck, we’re all here to help.
Please post pics!
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1977 Safari Land Yacht
2005 Toyota Tundra SR5
2022 Toyota 4Runner SR5
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