I traveled from western Canada to Norway/Sweden/Finland during a flare-up and almost missed a connecting flight. Loperamide/Imodium helped a lot!
I'm flaring right now and am going to Vietnam in a few weeks. In a similar boat as you right now!
I'm glad it helped! I don't know why the loperamide made me worse! It did say on it don't use with colitis though, so maybe the idea of getting ill made me worse. I think my doctor said it could've been a coincidence. Does the loperamide just constipate you?
Good luck and have fun in Vietnam! Remember to avoid salads, raw fruit with no ''seal/shell'' (bananas/melon) n don't drink the water. Vietnam won't be as clean as Scandinavia, but I'm sure it'll be just as enjoyable!