From the sounds of it...you're doing a local move. Which should help keep things relatively simple. The thing you need to be most concerned about is protecting them from temperature shocks. I imagine it's pretty darned cold outside in Northern Idaho!

You'll need a couple of well insulated boxes...cardboard lined with styrofoam...or get those little styrofoam coolers. Each animal needs to be contained individually...one snake per bag (pillow-case turned inside out)...and one gecko per deli-cup...(glad snap-lid containers with little holes poked in 'em)...but you can put both bags in one box...and both gecko cups in another box. Pack 'em in well so there is no chance of the contents shifting...and extra packing means extra insulation as well.

They can stay packed like that for a full 24 hours with no harm at all, so long as they stay warm.

Get their usual homes set up in the new house...someplace warm and quiet that won't be disturbed by all the moving (like inside a closet, maybe?) and you'll be all set.

Pre-warm the car before transporting the animals...and the heavily insulated carrying boxes should protect them just fine from the brief exposure to the outdoors between door and car.

Hope that helps some. I've no idea about transporting fish though.