You may look up this ham's website... k0bg. He has a lot of good info on there, though some is not gospel. I have a magmount antenna that I use in my apartment for an Icom 2100 for ARES nets, etc. that I'm going to throw on top of my jeep next sunday. Reason: we're going to be using a mix of vhf, and uhf bands for the race, and my jeep currently has a 2m ft2900 in it. My handheld is dual band, and just in case I have a hard time with repeaters I will use the mag antenna with it. So you can either run a second antenna mount and cap it to protect it till you need it while you're there, or use a mag mount for rare times you need a second antenna. Flexibility is a good thing to have, especially if your needs include emergency situations, or helping during events. Singlestack may chime in on what he has seen and learned so far as well.