jgsugden
Legend
With no magic: You'd try to use periods of better weather to put small groups near the enemy strongholds where they could hide and wait. Then, using the bad weather for cover, they'd attempt to sabotage critical infrastructure and resources. The goal would be to have the winter do the damage - all you're doing is taking away their weather defenses.
Alternatively, they'd work well away from the enemy strongholds to do things that would cripple the enemy in the spring, such as redirecting a river to cut off a water source once the weather changes.
With a little magic (low level spells): The sabotage becomes much easier when you have even low levels of magic. A familiar can sneak into an enemy stronghold and start a fire in the kitchen. Protect a rogue from the cold and give it invisibility and it can sneak in and do even more damage. Spying with abilities like Gaze of Two Minds is also very easy ...
Alternatively, they'd work well away from the enemy strongholds to do things that would cripple the enemy in the spring, such as redirecting a river to cut off a water source once the weather changes.
With a little magic (low level spells): The sabotage becomes much easier when you have even low levels of magic. A familiar can sneak into an enemy stronghold and start a fire in the kitchen. Protect a rogue from the cold and give it invisibility and it can sneak in and do even more damage. Spying with abilities like Gaze of Two Minds is also very easy ...