Surviving C2O and North 40 Camping

This will be my first time flying in and camping at Air Venture. I started this blog to solicit ideas that will help me survive the North 40 and C2O. I’ve heard a few good tips as I spoke to people (Gil Velez) but I am sure that there are many more tips that will improve my experience and more importantly, my wife’s experience!
Feel free to add your suggestions for all to read. Here are a few that I have heard:

Bring 8x2 boards to put under the tires
Make external control surface locks that mechanically block the surfaces, especially the rudder.
Purchase the camping days for more that you plan on using then get a rebate on the day you leave.

I have a few questions:
What is the best placement of your tent in relation to the aircraft and also is it a good idea to put a tarp over the wing with the tent underneath?
How do you keep drinks and food cold? Obviously coolers are the way to go but how accessible is ice?
I understand that they usually get a few heavy rain days but does the ground in the North 40 drain well or do I need a contingency plan (ie hotel)?