The bikes will be alright in the rain. Just make sure to remove any electronics you have ie. bike monitors, and any back pouches. It's the bikers I'm more worried about since the Weather Network's calling for thundershowers all thru the weekend.
Let's just pray that we'll have great weather as things can still change at the last minute.
Got to the dollar store and get a plastic drop cloth - much easier to wrap around your bike and cheap enough to toss out or small enough to fold up and tuck under your seat. I think a tarp would be too bulky
I would like to have bike wrap in that case. Well, I am going to organize the trade expo and need to get non bulky trade show displays that are easily portable so I can reuse them for upcoming expos without spending additional money. If you have ideas, please share here.