I think I have a bug in one plugin. I would like to load only this plugin, without having to delete all the other bundles in my pathogen\'s bundle folder, to debug.
Why not just:
When done put everything back the way it was. (The suggested method of loading Vim without plugins and sourcing the plugin file would work if it's a simple one-file plugin, but if you're doing an ftplugin then moving dirs around is probably best way and not that hard.)