Why not just use a mod to lift that restriction?
https://www.nexusmods.com/valheim/mods/61
It's not more cheating than world hopping, it's less time consuming and less immersion breaking. I also see this artifical restriction as a huge design flaw adding nothing to the game but annoyance and tediousness. And it does not make sense that an iron bar is restricted but forged into sword there is no problem at all carrying through a gate. This illogicality makes no sense and is just destroying my desire to play the game. Hence I use the mod (and some others) to make the game "playable" for me. So do yourself a favor and use this instead of your method. It makes things so much easier and is one point less to worry about.