I am popping in here because I joined WW (again) last weekend. Doing the online program and in the first week I dropped 4 pounds!

But very worried about this week as I have a rather sudden trip to take and will be eating on the run where ever I can find it and/or meals fixed by others with very little input from me.

I have already lost 50 pounds following South Beach and am trying to stick with the lean protein/veggies/less carbs (and only good ones) model but needed the structure to my meals that WW provides.
In the past I loved dottis weight loss zone and had everything downloaded on my palm pilot. Now of course it is available as an app for my ipod touch so wondering if anyone has any opinions on the app? Since it is $2.99 I don't want to spend the money if it won't be useful. I won't have internet connectivity most of the time and will be eating several meals in airport or area restaurants. Are there any other apps that are useful to use while offline?
I did print off the Simply Filling list and am wondering if I should try to just stick with that (if I can ) while I am gone.
Would appreciate any advice. I don't want to undo a hard fought week and end up with a significant gain when I get home on Monday.