DH and I like to keep up with things as we go... Just from our experience's we have started doing a few things whenever we travel no matter where we are at or going.. We just will pop in at the Resort or Hotel desk and ask for a itemized bill, it is sooo much easier to deal with a discrepancies right then. Instead of days later when there are alot more charges to wade thru on check out day. As well we like to get a copy of bill when we check out. It is sooo much easier to deal with this in person if there is a problem, than when you are home and realize there is a problem...
We always make sure to get a receipt when traveling... for any and everything that we pay for... I have this old beat up, recipe according file folder thingy, its like 6 X 8, that I throw into the back pack and we just stick all the receipts in it as we go, it has the divider built in so its simple... it's not fancy but it works...
DH and I always look at the receipts before walking away from the counter or kiosk, or getting up from the table... its easier to take care of things right then... and then DH will check the CC's later that night or next morning... and plenty of times we have found small problems and they just fix it right then...