I thought the Durrance route was currently closed. You should definitely check that out before going there. The main pillar shifted and they've been worried it's going to eventually fall over.
We did it a few years ago though and it was fun, not the best route in the world but something to do for the location and the feature. We had a team of three though so the second trailed the line that the third climbed on. There really aren't that many difficult chimneys on the pitch.
As for hauling a second rope there are a number of options. You could either pack up the 8mm into a small pack that you carry and make the second deal with it. If you have big chimneys and a big bag you can hang it from your belay loop below you as you climb the chimney as a way to get it out of your hair.
Another option would be to just lead on double lines and yet another option would be to simply have the leader trail the line with them.
All good options and all options you should probably try out over time to know what works for you, how much rope clustering each involves and which you'd keep using for different routes you may get on in he future.