Hello there @Cruiser. So sorry you've had to join this forum , but golly, you couldn't come to a better place for advice, friendship and off loading any frustrations.
I wouldn't be looking at changing any holiday plans until after your lumpectomy. Once surgery has taken place you'll have a full indication of what Your treatment will be from pathology results.
I originally at biopsy was having lumpectomy and radiation and was told my overseas trip could still go ahead. After lumpectomy the pathology indicated a need for chemotherapy. My overseas flight for three months later was cancelled.
I did travel to Canada 5 weeks after the end of radiation and was absolutely fine, just had to take it a little easier than normal.
Regarding your surgery, I had sentinel node removal and lumpectomy . I had day surgery and was home by 3pm and managed to cook baked beans on toast for our dinner that evening. I took it very easy but was ok. I advise you to have someone take you to the hospital and drive you home and stay over for the night just to keep an eye out in case of problems. The hospital discharged me as soon as they possibly could so I hardly remember walking to the car or the trip home. I totally understand you wanting to be at home in your own bed.
one big piece of advice I took on board from this forum is now is the time to look after yourself. Put yourself first, spoil yourself , be kind to yourself. You've had a big shock and it's all bloody rotten .
Keep asking the questions. Everyone is so helpful and friendly here.
Wishing you all the best with your treatment. You take care . Hugs xxx