Motorhome access to Port Meirrion, N. Wales

Can someone please advise what the access to their car park is like. I have had a look on Gogle earth and it appears motorhome parking is available and there is a one way system to and from the car park along narrow tree lined roads but how up to date is Google earth?

Is there in fact a one way system and do the trees obstuct the route in anyway. My motorhome is quite high and I am particularly concerned about low branches.

peedee