hi there,
Winter is not generally a good season for camping, unless you rent a cabin or bring a really good sleeping bags.
The peak season for
camping in Finland starts in mid-June and lasts until early September, so you might stick to those months.
Around 70 campsites in Finland are open year round, so if you really like to camp and can handle the weather, then you won’t have to worry as much about
when to go.
Also, you will have to pay a fee to camp in Finland, and the price goes up if you decide to book a cabin or caravan tent, which many people do.