YorkshireYankee - we have a contraption that converts from a car battery to an ordinary 3 pin outlet - you'd have to PM Manitas to find out voltage, duration and recharging abilities... if it helps, it's yours for the weekend.

Failing that, we could take it in turns to drive you round the car park all night with the car lighter adapter on!!!

Do hope to see you there... I'm curious about this machine of yours now!

Thanks LTS, that's very kind... here's the scoop: I have sleep apnoea, so at night I have to use this little machine that helps keep my windpipe open while I sleep -- otherwise I wake up every minute or two (because my throat has closed & I've stopped breathing). It is also a mercy on anyone who happens to be within earshot, as without it my snoring could wake the dead, let alone the sleeping!

I've considered hooking up the contraption up to my car battery, but it uses *so* much power that by morning (if not before) the car battery would be totally drained.

Mrs Duck, when you say "there are one or two electric points available", does that mean I might be able to run a cord from my contraption to the electric point? If so, camping could be a viable option for me after all...

Cheers (sorry to be a pain),

YY