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ohhh i get you. i would get a small temporary enclosure, maybe something like this, or really you could just make one out of Tupperware by drilling in some holes at the top, add some damp substrate in case they shed. warm the container with something like a heated blanket or hand warmers. pack stuff like a spray bottle, a hide and maybe a dozen crickets or whatever your gecko prefers. you should prepare your gecko to the enclosure by keeping them in it a few days before the trip. and most of all just keep an eye on your little one.
Exo Terra makes some nice ones, I bought their cricket keeper & it holds up well. (lid stays on tight while holding the handle)
Their faunarium doesn't appear to have handles tho.
I guess you could make your own but its not too expensive and the convenience of getting a big jar is massive compared to other feeding methods. You'd still want to occasionally supplement it with canned insects and raw meat and fish.
They don't move much when they're not eating, though they're really fast and fun to feed. If you get a baby you could keep it in something like this or another larger breeder box for about a year but they can grow to truly immense sizes for frogs, think small cat tbh, so they need a large tank. I wanna say 60x45x30 at a bare minimum but you also want to make sure the bottom of the tank can hold at least their height in substrate because they like to burrow.
They're also pretty filthy pets, you either need a good aquarium filter or daily water changes because they poo in the water then sit there soaking it in. I say that because filters/pumps tend to have a minimun height of about 5-10cm so you need to consider depth if you want a water section. In my experience a filter is probably pointless because they're so dirty it just means partial water changes every few days instead of daily even with the filter running.
Some people will scream bloody murder about touching pet frogs but if you're very careful and use safe gloves, cleaning materials you can transfer them to a smaller temporary water tank every day or two for a bath/drink/toilet and just have land, saves space and may be easier if your frog learns to trust you enough not to bite because the only time they're in contact with water it's fresh and clean.