I hope this isn't considered against the forum rules, as this subject is very close to my heart and I want to do all I can to help (especially today, as yesterday would have been my granddad's 83rd birthday, but we lost him to pancreatic cancer 7 years ago).
The company I work for has a group aimed at using people power to get the insurance companies to give cancer patients a better deal on insurance, as we believe it is wrong that, on top of everything else, those dealing with this horrible disease have to stress about the cost of insuring a holiday.
I can't post a link, but the company is called Bought By Many.
I hope you have a wonderful time on holiday and all the very best!
Ronny