On the subject of powering the systems, I recently did a large 3k festival with a small board, including the glxd+, a boss rc3 and a couple of other pedals using a usb powered multiway splitter and mobile phone charger. It handled everything without a grumble from a 10000mah brick.
One of these - https://www.ebay.co.uk/itm/395698273772?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=9i8vcyy4re2&sssrc=4429486&ssuid=2qBK-qb7QYq&var=&widget_ver=artemis&media=COPY
in fact I usually use this power setup as I always prefer to have as few power supplies as possible at front of house and means potentially quicker crossovers at busy festivals.