Without knowing the stage, it's hard to say, though from what you say it sounds like he may not be very advanced yet. I live in a small rural area, so we've only seen three cases of pancreatic cancer recently, and in every case about all the family was able to do was spend time with their family member and offer their support throughout treatment. Some family members offered practical support such as cooking, cleaning, and handling finances, while others drove them to and from appointments. Long-distance family called regularly and some made efforts to visit. Bear in mind, though, that two of these people were diagnosed at stage 4 and the other at stage 3, so by that point there really wasn't any question of curative treatment. If possible, talk to his doctor to get some information about the stage he's in now, possible treatment options, maybe even some advice on things you can do, and a prognosis if you want to hear it.