Thanks for the comments guys.
When we referred to plonking the scope out quickly... We have three holes which the tripod sits into the grass and at the moment it's pretty waterlogged and we hadn't had the scope out for about 6 weeks so we weren't sure how good our tracking would be and we didn't want to spend time freezing our butts off to get it right.
So we just put it out fired away and hoped for the best