The bulk of my wiring is done with SPT-2 Wire. The advantage of SPT-2 wire is that it can be cut to the exact length you need, and Vampire plugs can be added wherever you need a plug. I used SPT-2 wire for lower power devices like LED lighting and props that only have LED’s.
There are two versions of this wire and plugs. SPT-1 and SPT-2. Wire gauge is the same for both but the insulation is thicker on SPT-2 wire. When choosing which to use, you need to make sure both your wire and Vampire plugs are the same. I run all SPT-2 for the extra protection of the insulation and to simplify not needing to worry about which one I am using, SPT-1 or SPT-2.
For the Vampire plugs, you will need both Male and Female plugs. A Male and a Female for each end and extra Female plugs for any connections in between.
A highly recommended tool would be a Kill-A-Watt meter. When running SPT wire and adding multiple props and lighting effects, you want to make sure you do not overload your circuit. Most SPT-2 wire is rated for a maximum of 300 volts and 10 amps at 50 feet or less. A Kill-A-Watt meter will allow you to measure the power as you setup your display to ensure you do not overload the wire or the outlet. Do not leave these connected all the time. I use them while setting up to make sure I am not overloading a circuit, and then when finished, remove them. They are not to be used outside in damp/wet conditions.
For higher draw items like props with motors or amplifiers, I use traditional green outdoor extension cords.