Funny. Ds slept horribly with the bassinet insert of a portacot but is fine without it. I have a steelcraft one and I'm only 5 foot 4 and have no issues bending down to get him in it. It is heavy tho.
The hammocks won't last as long as you think. Maybe four months, six at a stretch. How often do you go away? Could you just buy one portacot and borrow another?