I came across this thread. There are great replies to your memory RAM question, but there are a few more aspects to take into account because memory issues are omnipresent, be that within the camera, the memory card, the RAM etc.
So I figured I might as well provide my experience as a travelling landscape photographer.
Basically I have two setups. One mobile Studio while travelling and one home base.
My travelling Studio consits of the following:
Cameras and lenses (of course)
Plenty of Memory cards and batteries and chargers. This depends on the lenght of the trips (half or full day, several days)
A TopNotch Laptop with a large screen (16:9). In my case a SAMSUNG M40plus (really a great machine I can highly recommend).
I prefer a large screen as there is plenty of space to view/edit images and still have enough room for the toolbars from Photoshop.
Get lots of RAM for it, as this allows to use several applications at once (eg. PS CS2, Bridge, iVMP)
Also I highly recommend to get a fast CPU, though this becomes more important for the Home base setup.
Most important is to make sure to possibly double up all data (images) while travelling.
As a first instance a Laptop Disk is fine, but you shoud also get an external harddisk connected to your Laptop using the fast connection USB v2.x.
Some people suggest burning DVDs that of course is fine. But over time the price-value ratio is better for a external harddisk (that I can easily connect anywhere, especially at the home base.)
For that I am using a Western Digital Media Center as it has 3-4 memory card readers built in.
My Laptop has that too and this feature is convenient when there is no power in sight and I still need to free my memory cards to continue shooting.
My Home base Studio consists of LAN (local area network) a fast PC (this of course can be an Apple machine or a Windows XP machine).
Important is to get a very fast CPU, lots of RAM, fast disks and the capability to connect 2 screens.
One screen, the working screen should be one of high quality, possibly properly calibrated and very large.
The other screen can be any type of monitor and serves only to avoid a cluttered working screen. I use it to place the toolsbars and also to display IVMP.
The core of all this is to keep the data in a safe place. There are several options the way this can be achieved, the DAM Book decribes these options very professionally. I personally chose the following:
I bought a so called NAS-Device (Network Attached Storage) with 1.6 TB Diskspace. This NAS serves as my BigBucket. It connects to the LAN and I can easily access it from any PC (depending on LAN-configuration it could be accessed even from remote, but this implies some additional efforts to keep your data for yourself). The NAS is setup with RAID-5 (redundant array of independent disks, 5 stands for highest saftey lavel against disk failure).
To be specific it is a Irfant ReadyNAS, there are others form Snazzio, Thecus, the Cube, etc. but Irfants Device seems to be the best (http://www.tomsnetworking.com/2005/08/19/h_2_h_infrant/
) and it does serve me very well.
The rough outline of my workflow starts with shooting images, transferring them onto my Laptop AND external disk (one may fail while under way). On the Laptop I can do sorting with IVMP and already some editing with PS CS2.
Once at home I transfer the gathered data to my NAS-Device and use IVMP to import my works from my Laptop version of IVMP to my main IVMP catalogue.
Now the hard work can begin.
But before doing so I do allways free my external disk, memory cards and my Laptop, also I get all the camera gear ready for immediate departure.
Hope this helps a little while making your choices.
You may wonder why I write such a long post. Well it simple, I learned by try and error and simply felt like condensing my experience and hence to share it with others.
Good luck and great light while shooting.