MottiKhan is right, but I might add that you can enter a wormhole with a fleet of ships, and in that instance only one ship of that fleet needs to be equipped with this Survey Module. The other can be whatever you like.
You can, of course, equip every ship you want with such a Survey Module, but as it is expensive it would be a waste to stuck it on Constructors/Colonizers (as these ships break down after constructing/colonizing) or Fighters (who cost maint). Fast long-range vessels build solely for surveying are best. You can add them to any fleet with which you want to enter such a wormhole, and release them after the jump to go for other anomalies.
In the earlier stages when playing against the Dread Lords this is actually a good way to evade them successfully, even when they match the speed of your ships.
The idea you described above is a pretty good one, I've never did that but it might work out. Stash a Surveyor with a Constructor and the rest all Colonizers - make the jump, built a base for reach and then go colonize.
To be honest, it's phantastic idea. Imagine an Immense galaxy with all the AI's having one area, which usually is more like a circle, a coherent mass. Using the above method could result in having to manage/built up 2 or 3 etc independant areals, as they might be out of reach. It might be an advantage, but also an increase in difficulty, as other races would be more willing to declare war on you. But even if one superior neighbour goes hostile and conquers one such areal, you still could be playing in the other remaining one, which probably are safe because out of reach.
I need to keep that in mind for my next game.