Road trip with p0496

Long story short my 2020 ecoboost mustang has a P0496 code, this is the third time in 6 months I have had this code, both previous times the purge valve was replaced by the dealer, the most recent time it has been "repaired" was earlier this week. The only symptom I have noticed other than the CEL is an occasional slightly rough idle while in park. Problem is I have a 600ish mile road trip later this week and don't have time to have it looked at before then. How bad is it to make that trip without the car being looked at?