You mean I can't get by with just my trusty Klein multimeter? Just kidding, but it does have a clamp on DC amp meter too, which is nice when finding parasitic loads. I also have a digital volt gauge that plugs into my lighter that has matched up well with the Klein.
Plan B is to do what I did a few nights ago - jump with cables off the emergency battery. I've got to figure out why the emergency start button didn't work. I rewired it so its a illuminated toggle switch last year. Plan C is another group 24 starting battery I made a box for and mounted a 1000W inverter on - I can always jump from that too.
Thanks for all the replies - I think I have enough information to go on now.
2007 Coachman Freelander 26' w/ E-450 6.0 diesel
1982 El Dorado Bermuda 27' w/ E-350 460 gas (sold)