Removed my swing arm for first time a few weeks back and this is what I did without buying any more tools...
Once you've got the locking nut(30mm iirc) off, the pin is not particularly tight. I used a 12mm bolt and locked a couple of nuts together on the threads. Use the head as your Allen key and socket/spanner on locked nuts. Obviously better to configure it so you can use socket to allow use of torque wrench for re assembly.
When refitting carefully mark pin position relative to frame to check it hasn't moved once locking nut is torqued up.
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