Hey there, Jennifer!
A very warm welcome to planDisney! Thanks for dropping by with a question!
I am so pleased to know you were able to secure a
dining reservation at
Wine Country Trattoria! Since you would like to add just one Guest to your reservation, the Cast Member at the host stand should be able to accommodate your request at check-in. If you’d like to try to modify prior to your arrival, head to the Disneyland Resort
website and select “My Dining Reservations” from the “Things to Do” drop-down menu. Then select the "Change Reservation" hyperlink for the reservation you wish to modify. From there you should be able to increase your party size. You may also attempt to modify your party size in the “My Plans” section of the
Disneyland Mobile App. Select the reservation in question, choose the modify button and make the appropriate adjustment.
While there is no way to formally request a seat outside when making your reservation, you can still request a table outside when you arrive at the restaurant. My recommendation is to arrive a little earlier than your reservation time. As long as you are willing to wait for an outdoor seat, a Cast Member would be happy to accommodate your request to dine al fresco.
I hope this helps! Thanks again for dropping by! Please continue to bring your questions to us in the future!
Tiffanie