Land cruisers achieve 30mpg. I know 2 people with different years and they rave about them. One is a d4d lwb, he's a boring bastard and revels in its 30+mpg.
Running costs would be high i'd guess though as with a lot of Jap 4x4's, parts can be pricey compared to run of the mill stuff.
Are 4x4's not going to be quite high for lifting the scooter into? What about boring stuff like a Peugeot partner escapade/tepee. High seating position but a low enough boot for loading the scooter.