If you're just wanting to do the crafting quests in the different worlds, you can always teleport to friends that have access to those worlds to get the crafting quests...Although, make sure you mark your location, so you can turn in your 'assignments' afterwards.
And there's several good spots to farm for the regents of the quests, that can keep lower characters away from possible fights, that I can suggest to you as well. ;)
Currently, I'm doing this with a new character. She's level 6, almost 7 right now, and is on the 2 final crafting quests in DS (she's short the frost flowers and needs a lift to a location in GH, so till hubby gets his laptop back she's kinda stuck)...She'll be nearly level 8 after they're both completed, and has yet to start on any fighting quests in WC. 8) I did this also with my other 5 characters.