DDP reservations are no different from reservations for guests who are not on DDP. All restaurant reservations are the same. Yes, the credit card guarantee, cancellation policies and no-show fees will apply.
The only difference for DDP users as far as restaurant reservations is with pre-paid reservations (CRT and dinner shows). Guests who already have a dining plan linked to their room reservation can make those reservations with a credit card guarantee instead of pre-paying in full. The cancellation and no-show rules still apply though...if you miss reservation at CRT or a dinner show you will be charged the full value.