Definitely agree that you should at least have some sort of voice and video recorder with you when going into an investigation.
We shop @ ghoststop.com a lot. They seem to have pretty competitive prices and are very easy to work with.
We use a Mel Meter EMF/Temp gage, digital thermometer, K2 EMF detectors, full spectrum HD video recorder w/FS light, IR video recorder & several digital voice recorders including a Spirit Box. I am sure I have forgotten some things but we just purchased an 8 channel IR DVR system that we will be trying out tonight in an investigation.
@ crystalcross – I am not familiar with the “IR tiny keychain camera”. Where did you get it? I am VERY intrigued. I feel like I am moving out every time we go on an investigation, so any equipment reduction is a huge plus!!! lol