I noticed that no one has replied as of yet so i thought i'd have a look at this for you... small swarms are hard - if the weather is good, there are enough foraging/nurse bees, and your queen is actively laying then you stand a good chance. They will need a lot of support throughout though and the easiest way of doing this is by doing two things:
1) Ensuring they have enough stores which you have done by including the frame of honey. Normally a feeder would be the way to go but a frame of stores is the best way if you have resources available. Don't forget the importance of pollen - if they don't have an abundance then the brood rearing capacity will be hindered.
2) The other essential is bees - you need them for nursing, foraging and hive heat! Where you're located i can't imagine night time temperatures would be too much of an issue but the easiest way to make sure you have enough bees is to take a frame of capped brood with all of the bees attached, give it a heavy smoking or a spray with sugar syrup and put it in the hive. The best way of doing that would be to keep it seperated from the main cluster by a frame or two to allow the bees to get used to each other. Just make sure you don't have the queen on there from the hive that you took the frame of brood/bees from.
I'm sure others will have some ideas too...