Tractor side, with my 3rd function, I typically hook up whichever side is of lower pressure first, then blip my rocker switch over to relieve the other side. (keep in mind this may deadhead the equipment on the connected side, but this is what PRVs are for)
But if we are talking about implement/attachments being locked up, it sure can be a pain in the butt if you had detached late last night, then, find you need to hook back up at high noon today. The sun heating everything up and all.
I haven't picked one up just yet, but I think this would be of help
Pioneer 1/2 in. Connect Under Pressure Tip, 1/2 in. NPTF at Tractor Supply Co.
has a small pressure relief tip on the top of the poppet.