LOL, you do have a point ScubaSteve. There isn't much coming out this summer to be looking forward to. The fun part about Nintendo DS is playing all the old games that I grew up with such as the Mario series. But during the fall, there's a lot to look forward to in terms of games.
And if you aren't in good hiking shape, bring your DS along. That way you can take a break now and then and power up Pictochat, assuming you haven't hiked far enough away from any local public WiFi networks.
There's plenty of games you can take along, but the key would be to only rest for as long as it took you to get ready to move again, otherwise you're not doing much but sitting in the woods and playing a Nintendo DS