Complete wireless set up with Kemper Stage or pedalboard - any experiences?

[Kiwi]

I gig occasionally at work and the backline typically provided is minimal to almost non existent, even then the engineers use it primarily for vocals and acoustic guitar.  I'm thinking about going fully wireless using a Kemper Stage Profiler (which can already split monitor and main outs). 

Has anyone got experience of using wireless IEM system AND wireless transmitter with just a pedalboard?  Which systems worked best?  If you were the lone user of IEMs, how did you patch into a band mix for monitoring if the sound engineers worked for the venue or organisers?