You have few options:

• Local variables for each control - fastest, easiest to do, just create a local variable and wire it.
• Property nodes - slightly slower, but with more capabilities. You can make it so it generates an event when the control or indicator value changes. It also has error IO.
• By reference - Similar to property nodes but more generic. You can build an array of control references, each can have a different type and iterate over them in a for loop, for example to initiate them all to their default values.