I carry a fold up backpack in my daypack for when I get some meat, it's a Hunters Element Bluff pack - folds down really small but holds 25L, I don't know how it would handle large weights (only used for boned out fallow so far), but there's always the option of loading my gear in the Bluff and the meat in the daypack.
This is the one
https://www.hunterselement.co.nz/col...packable-pack#
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