Possibly picked u up wrong but are the deer near a boundry or is it a small permission? Just when u mention 55 acres.
If near a boundry so u can't actually get downwind of the deer mibee try approaching the neighbouring landowner or do a deal with the stalker there. He will have the oppisate problem to u can get to the deer but there all on someone eles ground..
Are deer feeding out of feed troughs or just a coincedence there round about them?
If feeding out of them possibly ask farmer if he could move them nearer to get a safe shot. But that may not be possible as usually on/near a track/hard standing for easy access with tractors
Yes fella two sides are surrounded by forestry commission, this is how the farmer has access to this ground with a vehicle. As I haven't got permission off the commission I'm not sure where I'd stand legally, using their property as access with a firearm. So my only option is coming from the opposite side which is miles of 'green lane' just about accessible by quad bike for most of the journey then walk the last mile or so. So that's 3 sides covered. The last side of the permission is on an up hill, (imagine being on the brow of a hill but it goes on and on for ages) so can't get a safe shot as the target would be always on the sky line.
