Just a minor tip, a lot of fast food places will sell the pieces of meat cooked for less than the burger, minus the bun. When road tripping, I'd often hit a fast food place, get a couple meat patties and a side salad or two.

You're right on regular monitoring even without taking in carbs, depending on your metabolism, you can still get crazy high readings on almost no carbs in the diet... Took me 6 months of no carbs and had to still take insulin on occassion to keep it controlled.