Pond in the woods with a high water table

Thanks for taking the time to answer some questions here and for giving away a few books!  
I have a couple of questions.  First, is there anything special or difficult about expanding a pond in the woods?  It is already sort of a seasonal pond that fills up with the snowmelt each spring to about a foot deep but dries out completely nearly every summer.  We're thinking of digging it deeper and expanding it from the woods about 20 feet out into the yard a little bit.  

Second question - It is already a pretty high water table relative to the house.  It's typically about 2 feet below the basement, but when there's heavy rain it take two sump pumps running to keep the basement from flooding as the table rises.  The woods/yard pond would be about 100 feet away from the house and would be probably less than a foot lower in elevation.  Is there any way we could use the pond to help stabilize the water table?  Would it make things worse to bring more water storage into the landscape?

Thanks in advance for any and all advice!

You would probably make sure the pond is sealed pretty well or you may end up raising the water table near the house even with average rain.

I used to have a lot of problems with water in my basement, even though I am on a hill.  (fixed roof gutters, problem went away)
I can't imagine what a pain having a low water table like you have would be.