Stopping periods temporarily

We’ve just booked a 4-day trip to Lapland to take the children to see Santa! However, looks like the dates will coincide with my period! As I bleed heavily for 24hours of the 5-days, I really don’t fancy trying to get my michelin-man outfit off every half hour! Is there anything I can do?? Did ask my GP a year or so ago, for similar reasons, but because I’m on Tamoxifen, I can’t take the pill, which is whatr I thought would do the trick. Could I come off the Tamo, take the pill while on hols, then go back on Tamo??