Nice to hear that you've tried it
I think there are also great apps which could enhance the caching experience, imagine how you could develop Wherigo on a tablet!
@Wrighty showed me a good mapping app, think it was called Locus... Of course, it all depends whether the tablet has cellular connectivity, which is standard with even the most basic of smartphones; 3G tablets always seem overpriced
Interesting that you say the battery life is better than a phone. Compared to my phone the the couple of tablets I have used, a Nexus7 and a Tesco's cheap own model (forgot the model name) the batteries on those need charging more often than my phone. Some other tablets may have better batteries I guess.
Well, in theory battery life should be better, with a larger case you can fit a larger battery which should last longer. And I think the Tesco one is called Hudl
I think that the classic GPS only has around a decade left before smartphones will be up to the task with more power and better battery life. But that's another topic (literally
) - I think GS really ought to look in to developing a tablet-optimised app, there's potential for a good Wherigo experience if they were to launch an app for that too.