Sleepyhead data when using 2 machines

[microsnout]

So with summer approaching I was thinking of getting a second CPAP machine to keep on my boat. Either getting a PR Dreamstation for the house and taking the System One (without humidifier) to the boat or maybe waiting for the new Dreamstation Go portable unit for the boat.  This would save a lot of packing and moving the thing since I will be going back and forth a lot.  

I would like to preserve the integrity of the Sleepyhead database if possible so my question is should I: 
1) Just carry one SD card with me and plug it into the machine in use - or would this confuse the machines, Sleepyhead or both?
2) Use 2 SD cards, plugging each into the laptop to upload - or would this create a second user database?
3) Forget the idea, save the expense  and pack the thing up and carry it back and forth?
4) Forget the database, the missing data on the calendar will show me when I was away.

Has anyone who uses a portable travel unit solved this problem?

[chill]

Use 2 SD cards.  Sleepyhead imports based on the profile you have selected, not which card it is.

[microsnout]

Perfect. Thanks.

[Mosquitobait]

Go ahead and use the two machines. It's more of a problem with someone who is a pilot or reports to the DOT who has two different BRANDS of machines and that is only an issue if they don't accept Sleepyhead reports.