We used the Particle DEV IDE on Windows which makes it a lot easier to load libraries with tons of files. It's not something you want to do via the Online Build IDE.
What we needed to do was download the radio head library and then follow what we did in this thread:
You may want to switch to RFM95w radios if you just want something that works because I have those radios modules working 100% on my end and you can always turn the TX power down to save power.