Wifi Syncing and Backing up

I just purchased an iPad Air 2 and the age old problem turns up here too......... It doesn't connect via wifi unless i turn it off and restart it or shut down iTunes and restart it. WHY???? This continually happens. Then, once connected and a successful sync should I have to go back and do something else, I get the "looking for iPad/iPhone" messages and then it eventually stops and boots one or both.......... This is maddening. Should not have to go continually thru this.

Any suggestions.

Thanks