Rookie Question-going to AK

[TLock]

I know this may seem like a dumb Q?, but I don't know...

We’re doing a multiday Alaskan float trip with two rafts this summer. 
I’ve purchased hardcopy(paper) maps of the entire route and have a lat/long grid penciled in on them.
I have a Garmin 60csx and one of my partners has Magellan GPS310

My big question is:
If I do NOT buy Alaska map software, will our units still read latitude and longitude for us?   If they will, I see that as all we need with our paper maps.
Also, I have Garmin Northwest(CA,OR,WA) on my SD card now for my local stuff….Would I pull out the SD card for AK trip, or make it blank?
Thanks in advance, Tim

[Indrid Cold]

Your units will work fine with or without installed software maps and show lat/long. You can remove your card and place a blank one in the to record your tracks. Also the following Garmin document might be of worth: Using a Garmin® GPS with Paper Maps

[TLock]

Sounds good, Thank You for the assistance