Hi murphyminx, well I’m just happy you returned unscathed! And with some logs too!
The logs are best placed behind a shed, or against a wall/fence, in a quiet, shady part of your garden (under a shrub, etc), and preferably not facing north or north east. I don’t know what size logs you have, but if they’re quite large, you could position them pyramid-style leaving a big enough gap between the bottom two logs for a hedgehog to access. If the logs aren’t large enough for this design, stack them against your fence, using your fence as part of the ‘pyramid’; you can always add more logs as and when you find any.
Hedgehogs will make use of log piles all year round; they can be used as one night stop-overs, summer nests, hibernation, and even nurseries. They will also forage for tasty minibeasts amongst the logs.
Biggest tell-tale sign of hedgehog presence is their droppings in your garden! (google images for these

)
Lastly, don’t be disheartened if a hog doesn’t take up residence in your log pile, a pile of logs can very quickly become a flourishing wildlife community, so you'd be providing a habitat for a lot of other wildlife....
http://www.norfolkwildlifetrust.org....od_leaflet.pdf Log pile | Wild About Gardens British Hedgehog Preservation Society
I do hope some of the hogs from the site area will find their way into your garden, after all your efforts of risking life and limb for them too!
Well done!
EDIT: For some strange reason I read your post as ‘I did manage to get
three logs’! Hence my suggestion of a pyramid-style loggery. If you have enough logs, you can just stack them as per the pics in the links above, leaving enough of a space just above ground level for a hedgehog chamber.