In reply to tom_in_edinburgh:
Admittedly it's a pretty small sample, but so far 6 would head for home, 2 would prefer the journey outwards, and two don't give a preference.
I reasoned that as Homo sapiens is such a consumate coloniser/explorer there'd be a drive to go and experience the unfamiliar but also a desire to get back to home, the place where so much is invested.
Because neither has clear precedence I thought that the split would be 50:50.
I'd imagine that historically the norm would be a circular journey, out and back by the same mode- walking. Nowadays though, most long walks seem linear, one way affairs, with the 'drop off' or 'pick up' by motor transport.
Something odd seems to happen, in the accounts of more than a few people, when the furthest point of the journey is reached- the desire to keep on walking. However, if going towards home, it seems this drive is less remarked upon.
I'll have to look into this further unless anyone has any insight to offer here.
My own take on this is that it's something more than just anticipation of journey climax/anticlimax. Either direction of one way walks leave something unresolved.
Years ago I remember Ted Simon commenting in 'Jupiter's Travels' (his book about circling the globe by Triumph motorbike) how silly it would be to be accidentally killed just as he was approaching home again. I liked the paradox of that statement.