If someone has my Recovery Seed but does not have my password, will they be able to get in to my account?
Do you mean your Passphrase?
There’s no password connected to the seed. And there’s only a PIN code to login to the Trezor device if used.
If yes to the question above, it’s more difficult for the person with the seed to access your Hidden wallet but it depends on how weak your Passphrase is. (S)he can empty any funds in your Standard wallet at any time though.
You should move your funds out of the Trezor wallet(s), re-initialize your device with a new seed and set up a new Passphrase, then move your funds back to the new wallet.