In reply to ON4KJM:
I have now carried out over 200 activations with Paul G4MD and I can certainly recommend joint activations. Usually Paul operates on 5MHz and 3.6MHz with occasional operation on 7MHz, all SSB. I normally use 144MHz and 432MHz SSB, often followed by 10MHz or 7MHz CW. Only on a few occasions have we shared equipment and that has been down to either the weather or bad band conditions. We have always set out to be 100% independent of each other. It is good to have the security of each other’s company and also equipment back-up in case any problems arise.
Usually we set up some distance apart from each other, but on some summits that has not been possible due to limited space. We have actually operated sitting next to each other where getting good shelter from the weather has been of paramount importance - http://www.flickr.com/photos/18897403@N00/4612602651/in/photostream
73, Gerald G4OIG
P.S. It is good fun when there are a lot of activators operating on a single summit - after all, there should be enough bands to go around!