An inverter is so stupidly simple, there is no such thing as "play nice."
The only thing that should matter to you is which Mac you'll be using and its power draw vs what the inverter is rated to handle. Also, you should be sure about the electrical system of your vehicle. Most vehicles are 12VDC but if your Suburban is the 2500HD, you may have the 24VDC. Technically, it shouldn't matter, but I've seen inverters do some strange things.
So didn't you just contradict yourself there? Saying that there is no such thing as it "playing nice" but you've seen them do some strange things (not "playing nice").
Just buy a simple, one-function, one-plug inverter that matches all your specs on both the input and the output. At this level of tech, any problems you have will come come from the power supply side.
Forget I mentioned anything about inverters acting funny.
Always plug in your inverter after you start the vehicle. If a surge is going to happen, its when the car turns over. This advice also applies to power adapters that go in cigarette lighter ports. When you shop, just look for one with a fuse, and you'll be good to go............
Get one with a cooling fan. I have a 400 watt one that have no problem running 3 laptops off of it (iBook = 45 watt PowerBook = 65 watt thinkpad = 120 watt) laptops usually do not draw max power they are rated for. a 100 watt will run any mac. a 200 watt will run any two macs. a 300 watt will run 3 and a 400 watt will run 4-5. Make sure they have a fuse and overheat protection and a fan
yeah that's what i said, and then 2 others said above you. make sure you get goin first so the inverter has a solid, flowing power source.
plus if you leave it plugged in it drains from the battery and the alternator won't recharge - which could leave you dead on the side of the road, requiring a jump to start up.