Something to think about if the area isn't used much or at all for other dogs, is wildlife.
You don't want your puppy picking up some weird disease from wildlife either.
I always take my young puppies with me, in the car, and to say, my mom's house where I know it's 'safe'..
Only you can make the decision, tho I can be paranoid about puppies catching stuff, I kinda play it by ear when they are young.
Danger Danger vom Kleinen Hain aka Masi
"Angel" Jakoda's Bewitchen Sami CD OA OAJ OAC NGC OJC RS-O GS-N JS-O TT HIC CGC
"Angel" Steinwald's Four x Four CGC HIC TT
"Angel" Harmonyhill's Hy Jynx NA NAJ NAC NJC RS-N JS-N HIC
"Angel" Jakoda's Jagged Edge