Lake Garda Accommodation

Would love to spend a whole month or two in Malcesine before going to Gerlitzen. Preferably April, maybe also May, but wow are prices high there.
Is there anything cheaper than camping for > 25€/night as a single person?
Any spots to sleep in your car/van in peace?
Any whatsapp/signal/telegram groups to connect with other pilots to maybe share a flat or a parcel at the campsite?
Or any fellow pilots living there renting out rooms, couches, floors?