I was given a 10' pelican bass raider pontoon boat(b'day present from wife and kids)The salesman sold them a MK endura 30# TM. He said this would be enough for this size boat. He also recommended that I bow mount it as it would provide better manueverability.I fish with my 11 yr. old son and mostly on state owned property(electric only allowed)

The question is: Should I follow his advice on the bow mounting?

If it's a bow mount trolling motor ... yes.  If it's a transom mount ..... no.

I have a very similar boat and one thing to consider though is bad weather situations.  I know when I get stuck on the lake in heavy wind (meaning the lake is capping and I am probably trying to get back to the ramp) I am glad mine is mounted on the transom.  If it was on the bow, the front of the boat would stay down and take on quite a bit of water.  Just something to consider.

In perfect conditions though, I think you would like the bow mount better.