well, Bonnie, I'd be honoured to keep track of ya'll, so long as ya stick close...my O2 tether reaches 50 feet and that it!**BG** I reckon we can portage my concentrator, along with Ricks' assemblage, and Rog has it rigged to run off of batteries.:-)

I forgot to mention, I could also help Skarpi as I was one of the first in Colorado to get an EMT certification way back in 1976! I am really, really good in emergency situtions...very calm and capable, take charge...