Yes the Rose and Crown patio is a wonderful spot to watch Illuminations, and yes I have done so several times. My advice to you would be not to count on it, or get frustrated if they can't seat you on the patio. There is limited patio seating, and believe me, everyone wants to show up between 7:00 and 7:45 and sit at one of those tables. I have read posts here where some of the CM's will not allow you to wait for a patio table, but insist you take what table is available. It can't hurt to ever so nicely make your request. I personally have had success doing so. If they decline to honor your request, I would suggest you eat dinner inside and then leave in time to get a spot somewhere else. We have eaten inside here as well, and personally enjoy the atmosphere better than the atmosphere on the patio.