Because it won't tell you if there's humidity inside the bag that could potentially harm your device.
Silica gel isn't electronics. It'll change color when it detects moisture.
Maybe he needs a cheap display for reviewing photos taken on the trip? Something, he might do some basic editing on? Something durable, not too expensive, that fits his needs.
Just throwing thoughts on a wall, waiting to see, that sticks.
sdoering got most of it right. I also would add backups, it doesn't feel safe keeping all your pictures on cameras sd cards for weeks. Actually, for me it's mostly backups, that's why a dirty cheap rougged tablet would be nice (cheap because I don't do many of these trips).
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Hey, let me know if you do. I am not a toddler (of course), but for my kayak trips I need something decent, cheap and waterproof.
Check out aLOKSAK bags. I've successfully tested my Nexus 7 tablet under the shower with one of these bags. For scientific purposes, of course.
For science, I'd put silica gel crystals in it and take it to the shower before I dunk my tablet :)
You could just use a square of cardboard... why use electronics at all :)
Because it won't tell you if there's humidity inside the bag that could potentially harm your device. Silica gel isn't electronics. It'll change color when it detects moisture.
I don't mean to sound as a luddite, this is an honest question: why would you need a raspberry pi tablet in a kayak trip?
Maybe he needs a cheap display for reviewing photos taken on the trip? Something, he might do some basic editing on? Something durable, not too expensive, that fits his needs.
Just throwing thoughts on a wall, waiting to see, that sticks.
sdoering got most of it right. I also would add backups, it doesn't feel safe keeping all your pictures on cameras sd cards for weeks. Actually, for me it's mostly backups, that's why a dirty cheap rougged tablet would be nice (cheap because I don't do many of these trips).