[Mumnesia]

When we are at Expo's we use our portable eftpos machine, which came supplied with our merchant facility, so we have had it a while. All the rest is through Eway which is an easy to use system and very cheap, it will back off your existing website if you have one. We have a lot of return clients so their details are stored without having to keep asking them.
I think they have an app for phone use now as well.
When we are at split sites, one will have the eftpos and another will take a laptop, so we can take a sale whenever the need arises.
The aspect I like about Eway is that you can track & view all the past sales not just daily totals for reconciliation.