I'm wondering Kurt whether you are in areas with a weak wifi signal, and your tablet won't connect? Mine is a 4g/Wifi model (not sure what yours is), and by default when it thinks it's got a weak wifi signal it displays a message "Your internet connection is unstable" and it switches to my mobile phone network instead (Telstra/Australia). This is activated by default, and it can be turned off through the advanced settings by unselecting "Auto network switch". By doing so, it keeps the weak signal, and in your case, may then allow it to be assigned an IP address?
Here's an example :
Wi-Fi is unstable or cannot connect: Samsung Ga... | T-Mobile Support
I may be totally wrong, but something else to look into, and disregard if it's of no use.