Agree w/Jaques. Your best source for advice is your doctor. My own personal opinion is that cruise ships are cesspools of bacteria in a confined area. You cannot control the cleanliness of buffets, food prep, staff & a ton of people.
If the cruise is that important to your DH & postponing the cruise not an option, you might ask the doctors if better to delay treatment until after the cruise. Don't forget that treatment kills both good & cancerous cells, therefore compromises the immune system, not to mention side affects. It may not make that much difference to wait & your DH would have a much better vacation experience.
DSS,35YO,unresect mCRC DX 7/'14,lvr,LN,peri,rib
FOLFOX+Avstn 4 Rnds d/c 10/'14
Gone From My Sight 2/20/15
Me:garden variety polyps + precancerous polyp, diverticulitis
Carergver x2 DH,DM dbl occupancy,'03-'10
DH dx 47YO mCRC,'04-'07 fried x HAI
DM dx CC 85YO,CC,CHF,stroke,dementia,aphasia