An adult would be ok, even an older juvenile would probably be OK. A young baby might have problems. If there's some way you can get someone to fill the water bowls that would be a good idea, or else use deep enough bowls so the water doesn't all evaporate.
I'm no expert but i would have to say anywhere between the 25-40g range should be fine. i mean as long as it has enough fat/water storage in it's tail i should be fine.
if there eating mealies you can leave a bowl of mealworms in there, may not last the whole 5 days but should atleast last 2 or 3, probably be a good way to get them to switch over if their not eating them.
I have to say that ACPart usually if not always says the right things.
First of all it will depend on the age of your Leo.
Water is important, so get one of those water things that have the water bottle attached.
As for food, put some extra mealworms in a dish.
As for your feeding schedule ... well look at the fat that is on the tail.
Assuming that you are there most of the time then, feed your Leo every other day while you are there:main_thumbsup: and then a week or so should not be a problem if the Leo had to go without food.