I'm from Reno. I've spent a deal of time in Vegas. I've been in the heat. Who said I'd be outside?
Ahh, the biggest lil city. i dig that place. I think that since you dont have a vehicle that already acts as your home and are looking for a ride there.
Do you have some sort of trailer that you also need towed there that you aint telling us about. What type of shelter structure do you plan on living in?
If you can line up some allies with a vehicleand rideshare from Reno you can hit Twin City surplus Army Navy Store in Reno for the water containers, they have lots of solutions, cheap but if you dig around you can find cheaper. They are all set up for the huge influx of Burners going to Black Rock city. If I were you I would dumpster dive all the awesome stuff that those leaving Burning Manthrow out once they get to Gerlach. Shade structures,hexayurts, tents,coolers,camp stoves and yes water tanks. Obviously the exodus from BRC is after you want to go to the Slabs but if I was in Reno I would be looking to take advantage of all that good stuff. Most was bought just for 8 days in on the playa.
There is a ton of expensive camping, survival shit that is discarded. You could even set up stations on the road with signs to collect it before it goes in the dumpster.