Italian food is not all about
pasta and pizza. They make fantastic meat dishes and seafood dishes and great veggies. I don't think you will feel deprived by sticking with protein and veggies and skipping the pasta. But maybe you're looking the excuse of it being "Italy" to indulge? It won't kill you but will you be able to enjoy sightseeing if your symptoms re-occur?
Have a small piece of pizza so you don't feel deprived if you need/want to. No one will be looking over your shoulder. It's your life, you get to decide how to live and eat. When I felt like cheating on my modified SCD plan I usually waited until I didn't have much going on the next day in case my gut rebelled but I never ate "off-list" food for several days in a row therefore didn't usually have bad results.
Now if you said France
and you needed to have bread and croissants then I could sympathise with you. Pasta? Not even on my radar. We all have our hot buttons
Current diet=SCD+Paleo modified (some fruit+dairy OK now)
In remission April 2010 after 10 years of UC with no remission ever
Jan 2010 began SpecCarbDiet (modified to remove dairy, fruit & juices,)
Gluten-free=bleeding stopped in 3 days, 95% remission in 5.5 months on SCD
(9)Balsalazide+(2)Citrucel, mesalamine enema as needed (1) VSL#3 nightly