Thanx Baron,
A few little twists to the plans - I spoke with the fella @ premium yest morn and he tells me the ONLY avail (well, b4 i leave to korea for a side trip on sun 1pm) is Sat (which is good!)...... , but only for 12 hrs (which is bad,,,,,, i think?!)
I am even considering doing the 12 hr rental (8pm pick up sat nite, 9am drop off sund morn, get the xtra hr coz their close time is early^^),,, since he said it was only available from 3pm sat, i askd, 'cant i get a 24 hr rental and jus return it 9am sund?'....
then he points out that if i want EIGHTEEN hrs (which i would still gladly pay the 24 hr price for), it would be 12 hr price + 6 x hrly rate (which is a lot more), , , a bit of Japanese wtf.....
in any case, have been researching Shuto Expressway., drive across rainbow bridge, poss down to yokohama, etc
all sounds good, tho all speed limits are max 80kph apparently,,, LOL :-P
i will be looking into things further :-) got a coupl of days to come up with somethin