You mention a "separate trial account". Does that mean you already have a TRKD trial account ?
If yes, that should suffice, but you might need to contact your account manager to check the permissioning of your account, to ensure you can access all the data you require.
If you do not have a trial account, then yes, you need to get one, TRKD will not deliver data if you do not authenticate with a valid TRKD account. Please contact your account manager to get a trial account.