Ds2 starts on the 7th. I have one in secondary already, but he has SEN, is in an out of area placement with door to door transport, so it's a completely different set of worries this time around. At least I have been informed he has the same driver and escort this year, so I can stop worrying about him and focus on ds2.
Ds2 is both nervous and excited, but has arranged to walk with the same group of friends he did on induction day and is lucky enough to have three of his closest friends from primary in his form (this is almost unheard of at his secondary) which has helped reduced his anxiety quite a bit.
I think we have everything he need, except his PE/Sports bag, which is due for delivery tomorrow or Wednesday, but I still haven't named everything.
I'm most worried about him walking there and back, not because of the route - he's been walking it every other day with either myself or dh during the holidays, so knows it by heart now - but because he has joint problems and used to be in pain after a full day, then walking home from primary and we only live three minutes from his primary school. Now he'll be walking just over a mile with a bag full of books, sports kit etc, plus carrying his bag around all day. We've made a point of trying to get him fitter over the summer holidays, but we won't know how badly it's going to affect him until he starts.
I also have to wait for the start of term to set up the care plan for his pain relief and make sure all his teachers, especially PE teachers are informed. I tried last term, but the pastoral manager said they have meetings with parents for this in the first two weeks of term - not great when he has to be sat facing the board without twisting or craning his neck and his new teachers won't know for the first week or so. 
Other than that, I know from other families locally that the school takes care of the new y7's very well, pupils are escorted to and from lessons by class buddies and there are individual buddies for any pupils that need them too. I know quite a few children that are already there and they all seemed to take to it really well.
Just remembered. I need to top up his lunch money online though. I put in enough for the first two weeks last month, but need to add some more before I forget.