I want to send some PRV to another Incognito wallet. Do I have to pay some fees or are these transactions free of fees?
Sending tokens within Incognito costs 0.0000001 PRV, so go for it
It is alway wise to keep about .001 PRV in your wallets to cover the tiny transaction fees.
Worst case, you can always go to https://getprv.com/ to request some PRV to cover a few transactions.