Well, there's small travel trailers, as mentioned in my post... if you know anyone who is willing to donate one, we are truly desperate for these. However, being big-ticket items, we've had no luck so far.
Apart from that, there are needs such as sleeping-bags, cots, etc. However, these are hard to mail to us, and we're often better off buying supplies locally. This is why cash helps - it's easily sent, whereas large boxes of stuff are harder to send, and waste money on postage too.