Good to hear your holiday went well, so did mine thanks!
I was wondering about the open water swim so emailed the organiser who was really helpful, this is a copy of his reply:
The swim is only 200m (8 lengths of a standard 25m pool) so not massively far. As such I would say you could do the swim without a wetsuit. This will depend somewhat on the weather leading up to the event though. Currently the lake is just over 20 degrees Celsius. Most leisure centre pools are around 28. Also as the lake is quite shallow it never really gets very cold, and heats up pretty quick. What I would really recommend doing is coming down on a Wednesday or Friday 6-8pmand have a go. You can ride your bike on the track after as well, and I would be more than happy to give you some tips for swimming open water. We did have one or two people doing the whole 650m loop without wetsuits on Wednesday, so I am sure you will be fine. Hope this helps you decide Tri!
No longer a runner myself, but this thread caught my interest as I used to live in SA as a kid and remember turning out as a spectator ( various points along Pinetown and Hillcrest area) and it was a massive event!
Just wanted to say what a huge respect I have to all of you who have competed this and or about to do so in 2015 - just got back from SA last Thursday after not visiting for many years and those uphill elevations you'll be doing next year are not for the faint hearted! Had a couple of days on the bike around 1000 Hills area and that was tough - and nowhere near to the marathon distance!