If it really becomes a pain, use the world hopper trick to move the iron.
If you dont know the trick:

- Make a random world, set up some chests
- Farm up iron on your main world, and pack all the iron on your character
- Log out of your main world, log into your random, place iron in chests
- Log on to your main world and go to your base, log on to your random and grab your iron
- Log on to your main world and your iron will be on your character in your base

... or use a mod :P