Here is what we do with our money. There is 3 of us as well. What we do is we fiqure out what our spending money would be after paying hotel, gas, dining and whatever else. Then take the money we have leftover and divide it by the number of days and then divide by 3. Then we have that money for that day what we dont use that day we add to the next day.
Example We have $2500 (used to stay of site and drive)
1. $500.00 hotel (rounded up w/taxes etc.) Econolodge type hotel
2. $300.00 gas ($30 a fill up gives us 10 fill ups and takes us about 3 down and 3 back)
3. $700.00 Food (7 nights = $100 a day) do same with this as well we spend $75.00 one day we add the $25 to another day.
4. $1000 for souveniers for 7 days =$142.00/3 = $47. per person per day.
We usually dont buy anything the first day or two we go window shopping and then towards the end we buy it so we may end up having $300 to buy stuff with at the end and normally forget some stuff we wanted to get and we usually come home with some money leftover.