Camping festivals ahead, advice needed!

I'm in a rut, I'm in a really positive mood to eat right and work out and it's rare that it happens so I want to take full advantage of it. However as some of you might know I do fire performing/juggling etc as a bit of fun on the side and I have two trips coming up, one 5 days camping in Wales starting tomorrow and another in Munich next weekend for a week. I find it really hard to eat well when I'm camping and on holiday, it'll be camping for both of them. And while I'm going to be doing probably quite a few activities when I'm there (slack lining, extreme unicycling -google it-, juggling, fire spinning), I know I will still eat lots of crap.

And then it"'ll throw me right out of sync, I really wanted to make august 'my month'. Does anyone have any tips for eating/keeping the motivation while camping? I do these several times a year and typically the diet is crisps, chocolate, biscuits, ciders, rum and some sandwiches! Everything a growing boy needs .

I know I'll be quite active, I'll be performing and teaching a few workshops like photography and fire stuff, but I always seem to make excuses at these things to eat badly like 'oh I'm camping/I'm on holiday/it's only a week' but I'd love to be able to make a lifestyle change and still be able to be healthy when I go away. I was thinking about taking my fine oats and protein powder for morning breakfast shakes for a start.