windage tray/gasket

Installed my engine a few weeks back filled it up with some oil and got a leak towards the back of the block...well lets just say I didn't add RTV to the back but i did by the timing cover....long story short, i started the jeep up 3 times and its idled at most for 3 mins. can i drop the oil pan, pull the windage tray down lean all surfaces RTV both locations and reuse the oil pan gasket??? its never been through a head cycle.

or do i need a new gasket.