Be ready for a long, slow recovery. HIPEC is very hard on your body. Make sure you have a source of music with you. I also go to surgery with my (stuffed) octopus - it's nice to have a friend in bed with you. (Also, the comments I got, doing my walks with an octopus on my IV pole were priceless! He helped the other cancer patients as well as me.
Hopefully, all will go relatively easily for you. I have a friend who was up and running - almost back to normal - within 3 months of HIPEC.
Sending lots of hugs.