Macadamia nuts are one of the highest calorific nuts.. Fairly sure they sell them at that plastic free shop in town.
Brazil nuts too, the high levels of selenium are useful.
Don't forget the humble dried banana - the semi soft ones.. There's lots of potassium in there, for muscle repair.
There's plenty of recipes online for vegan energy ball type things - like those ones that
@Clare made last year.
Any kind of kibble like bombay mix, or gram and sesame extrusions are a bit more-ish and high in calories too
Definitely you need the calories, but don't forget the micronutrients too.. You're not just an infernal combustion engine to shovel calories into.
Brain function, mental health.. And by extension stuff like resolve, and navigational aptitude are affected by these things too - not getting enough zinc for example (Brazil nuts again) can affect mood.
Of course if you're only out for a day or two, then it probs doesn't matter so much, so long as your diet at home is OK..
It's the fresh stuff that perks me up the most, on longer trips tho
Edit..... Vegan Farm Femme Jess (she of the green hair) would be a good person to chat to about all this, she made some amazeballs vegan peanutbutter and chocolate cups.. Like the Reeses' ones, only x100 yummier, less claggy, and I imagine, better nutrition.