Sirena have "Premium Tuna Fillet" in sachets which are nicer than the normal packet tuna.
For day one in colder areas - the smoked salmon in those vacuum sealed packs lasts ok.
Wraps/Crackers with tuna/smoked salmon, mayo and dedydrated cucumber/zucchini.
Deb with packet salmon and mayo is a strangely yummy combo
Dinners - you might want to get a dehydrator and make your own to give yourself more options than what is commercially available, eg vegetable curries and chicken mince dishes.