He'd need boiling water, though. And unless he has a stove and fuel (plus I really don't think he has any experience outdoors, except to brag), he'd have to carry a pot and build a fire. No way he's building a fire while he's being manhunted.
And food? He'll be either an animal attractant or an LE magnet.
And if he takes pre-packaged meals?
He'd need at least 3 of those freeze dried Mountain House meals a day, 21 for the week (and he's been gone for at least a week). Hahahaha! Those things are super bulky! And that still won't be enough food, really, so you've gotta take maybe nuts and Snickers and dried fruit. Then there's the problem with indigestion as you get used to eating those meals....
But maybe you only take 2 meals a day of Mountain House. That's still 14 packages!
Mountain House is, like, $7-$8 average a meal.
I suppose he could do Ramen instead, but imagine all that Ramen! lol.
Unless he had a water filter, he'd almost certainly have made himself sick on swamp water.
However, apart from the unlikelihood of all that.... This is a man who, when life got rough, went running home to momma in the car of a woman he killed. IMO there's not a snowball's chance in heck momma's boy is out there eating raw Mountain House in an alligator-infested swamp.
Can you leave food caches to pick up later? Yep, but in BL's case, they likely would have been sniffed out by LE.
Is it possible for experienced backpackers to go a week without re-supply? Big YES. Easily. Two, no problem, either, if you have a big pack. But "experience" is the operative word here. And it takes a LOT of planning not to over- or undersupply. You want a lot of calories for not a lot of weight and bulk. And you don't want containers like tuna cans.
There's been no sign that BL has any of this kind of experience, either, no matter what he's convinced his family of.
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Food calculation rule of thumb when backpack planning: 2 lbs per person per day. But it should be optimized by common sense. You won't want to take 2 lbs of butter (nice dense calories) or 2 lbs of Ramen (carbohydrate fuel).