Any advice for T1 diabetic attempting a Ultramarathon?

Hello all,

As said in the title I am attempting my first ultramarathon on the 19th of March. Running as many laps as possible of 6.6 mile route over a 6 hour period. Aside from the normal tips and advice for attempting this kind of distance, are there any T1 diabetics out there who can offer advice specific to diabetes, from their personal experience running this kind of distance?

I have ran a couple of marathon's over the last few year and got by having an isotonic gel (20g of carbs) every 6 miles or so, with the blood sugars going up and then gradually falling over the next 6 miles.

My concern with an ultra marathon is that, everything I have read suggests that I need to consume a lot of calories when running ultras (my aim of the day is around 5 laps / 33 miles) and that the rest stations are full of cakes, sandwiches, etc.

As you can imagine this makes things much more difficult for me to manage, the last thing I want is to need to inject on the go after eating or worse of all... Have a hypo and lose my running mojo!

Any advice would be really appreciated!