If you don't mind I'd like to know why you are not a fan of having the other groups along? If you are afraid of a public prosecution feel free to email / pm me about it. Personally I think other marquee's could make it epic!
Nice to hear from you, I have no quams sharing some of the reasons with you and the rest of the forum at all, and once again these are my personal feelings and not a mandate because I came up with the idea of this run, this forum decides how when and who participates should it go ahead not me.
The reasons are many and varied, but in the main they can be broken down as follows.
As Rev suggested, this could be a great vehicle to raise funds for a great cause as a result of a bunch of enthusiasts getting together, for that reason the spectacle of an all Z event would draw more attention than an open event, this may sound rather vain but from a marketing perspective it has merit, the other reason supporting this is that behind the scenes I have already started to gauge interest in if the media would be interested in doing a documentary of the event and route and mixing non Z vehicles would diminish the appeal.
A number of forum members have indicated that support vehicles would be needed, the reason being that we would need to anticipate generic breakdown possibilities, I'm sure that each member could stock up on a number of emergency parts for their own vehicles, i.e. water pumps, brake hoses, etc however having a cross section of other vehicles and not knowing the preparedness by the drivers could put a strain on the events time schedule should multiple breakdowns arise.
This forum is unique as it caters for the Z community, if you wanted to open this up to all models the Nissan family then why not just make this a Datsun / Nissan forum? the idea of running this was to get the Z community together, if the S13-15 boys wanted to do this run would they invite us?
This is an opportunity for Z enthusiasts across the nation to get to know one and other and their cars as opposed to just the nett, and I don't see why we would need other marques their as a distraction.
I apologise if these views may seem narrow minded to you, and in the end if we are serious about moving ahead with this as opposed to just postulating on this forum then it can be put to a poll, either way I'm fine with the outcome and will still participate, its not my decision.
I get the impression that perhaps you think that this is a pie in the sky thread, all I can say is that everything I decide on doing Gav I do, and this is no exception, maybe if it does go ahead we may get the time to spend some quality time together in real life as opposed to just traded posts via the forum and gain a deeper appreciation for one and other and our cars.