the prototype filter test circuit uses blocking caps, so one could suppose the input is a DC short circuit. So you need the caps IF that port is connected to an active device that has DC bias on it.
800 MHz, it is hard to get a capacitor that will not work well...since the frequency is so low. If you were at 20 GHz...they you would need to use either one specifically designed for microwaves, or test a lower cost version to make sure it did not resonate.
200 pf should work fine, as stated above