What products do you think are essential to bring for aftercare after a beauty trip?

Hi everyone! So I've planned to go to Korea next month and I want to try out a few small treatments. I know that after treatments, good aftercare is definitely needed, but I'm a bit confused about what I need to bring from here or buy there.

For now, I'm thinking of bringing cooling masks and maybe silicone scar sheets, but I'm still unsure if they're worth it or if I can find them in Korea later. I'm worried about bringing heavy items. Plus, I want to know what kind of soothing gels or similar products are good for the recovery period. Has anyone had this experience before?

For those who have traveled to Korea for treatments, do you have any recommended tips for aftercare? Are local products there better or cheaper? And how important is it really to use cooling masks every day? Thank you so much!