Yes and no, they freeze well and it won't affect the flavour, although you want to soak them in warm water to rehydrate them a little when defrosting. I prefer a chili to be a painful punch in the mouth so my sauce recipe is below (this should be vegetablist friendly)

1/2 tin of chopped tomatoes
1/4 tube of tomato puree
1 bsp smoked paprika
3 whole chipotles, rehydrated and finely chopped
1/2 tsp cinnamon
1/2 tsp cumin
1 tsp Blair's mega death (550,000 shu)
3 drops of The Dr's 'Psycho Drops' (1,000,000 shu)

I don't recommend people with heart issues to eat this sauce.