Here's one way to make that process a LOT simpler. Get yourself a free domain forward:
http://free.domain.name/en.html?domain=homeip.net
I've used this for years. Instead of having to check your current IP, software updates a server with your IP at all times. Then, when you need access you just type your domain name and voila ! e.g.
aqua-digital@dyndns.org would bring you to your current IP.
At least that way you always know how to connect.
Next, make sure your have a laptop with all the software installed and configured on it with you. I never leave home on a trip without !