I've said a million times and I'll say it again here:
If you're on a poker road trip, money you don't spend on food and lodging goes directly into your bankroll.
With the WSOP (aka "Summer Camp") coming up, it's time to sharpen your pencil and start moving some dollars (Euros, Pounds, BTC, whatever) from the 'Expense' column to the 'Bankroll' column.
When it comes to lodging, I've already written a piece talking about the beauty of non-Strip hotels. Definitely check that out. And I do note that even during busy times, it may be possible to get a cheap hotel on the Strip if you work at it.
But here we're talking about food. How can you eat at the WSOP without paying $5 for a banana?