If you're just looking for temporary data collection, then why go through all this trouble. A clamp-style amp meter will work just fine.
I agree with you, just don't have one. That is why I was thinking of hooking something up temp and then switching it to my TT.
I have several cheap multi meters, guess I could hook one of them up temp also just to get my readings or like you said buy a clamp on meter :)
I started out looking for a waterproof volt / amp meter and planned to mount it in the kayak. Since they can't be found I decided to get a meter hook up temp and then move to my TT.
Just a volt meter that is waterproof is no problem to find, so I ordered one of those for permanent use in the kayak.