I have been reading up on sugar gliders a lot, but I can't find out what you do when you go on holiday?

Like Sara said, if you are planning on traveling for that long of a time period then Sugar Gliders are not the right pet for you. It seems like a big commitment because they ARE. You should really spend about 4 hours a day with them. The more time spent with them, the better. The bond with your Suggies won't be broken after a week or so of vacation, just like a dog. They won't forget who you are and they will be very excited to see you. They are, however, very emotional animals. They will get depressed when you leave so try to keep your vacations in a reasonable time frame. There are websites that you can get traveling cages for them. Whether or not you should bring them with you depends on what type of vacation you are going on. and how you are traveling, how long the travel is etc. If you are planning on going away for a longer period of time and you know in advance, I would suggest having a family member or friend handle your suggies as often as possible so they will feel comfortable when left with that person. It will also decrease the chances of depression if they have a familiar hand feeding and loving them while you are away. Suggies usually bond to one person in specific but they can bond to an entire family as well. Good luck and I hope you make the right decision