Don't fret about it - the questions I and others have raised are not, as nashvillebill so eloquently put it, "to piss on your cornflakes" (!!!) but just out of a friendly concern to help you consider all aspects of the situation. If it's a rip-off situation, there are good, ethical reasons for not supporting it; if it's all above board, there might be ways to keep the cost down which will make the task of raising 'fundage' that much easier.
For example, what about hiring a vehicle and driving down there? It's a long haul but not that much more than the Houston to Atlanta round trip I did in 2001. A tour bus could be your transport, storage and home and might work out cheaper even if you have to add a couple of days to your expedition to cover the drivetime.
Anyway, as far as money raising ideas, how about some benefit gigs for yourselves? If you can support your local venues by doing free gigs, it would seem reasonable that they might support you in raising some money.
My band has the less ambitious aim of covering our rehearsal fees, so we've come to an arrangement with a pub near the rehearsal venue to do a gig this Sunday. The bar provides money to hire the PA and benefits from a big increase in custom on a Sunday evening; we're charging a £3 cover (a bargain - bring all your friends

... gigspam over). Even if we just manage 50 people, that will pretty much cover a months worth of rehearsals and we're expecting somewhere nearer 100+ throughout the course of the evening.
Of course, it might be tight to get the money together in time for this August (unless you've got a huge local profile) but perhaps you can arrange for your place to be held over until next year if it doesn't work out this time around?
Wulf