[Tagging] different access restrictions for different entrances to an area

[Nathan Edgars II]

http://mapper.acme.com/?ll=28.42073,-81.58224&z=15&t=K&marker0=28.41788%2C-81.57674&marker1=28.41250%2C-81.59031&marker2=28.42977%2C-81.57694
This is the area behind the Magic Kingdom in Walt Disney World.

Signs going northbound at A and B say "Service & Authorized Vehicles Only".

Southbound at C, a sign says "Private Property / Walt Disney World 
Resort Guest, Cast, and Business Invitees Only".

(I verified A and C a few days ago; it's possible that B has changed 
recently.)

The exact tags to use for these are a matter of recent debate, and it's 
not worth rehashing that. But it's clear that they are different (a 
guest can enter Disney from Reams but can't exit that way), so for the 
sake of argument let's call the former access=private and the latter 
access=destination. Note that the area from A and B south to the 
beginning of the motorway is also access=destination due to the presence 
of the main entrance gate (and a sign identical to that at C on Vista 
west of Golden Oak).

The question is how the segments of road between these points should be 
tagged. Should the ability to U-turn be taken into account (thus 
everything but the close vicinity of A and B is destination in both 
directions)? Or should it be assumed that one won't U-turn for the hell 
of it (thus all three roads are private northbound and destination 
southbound)? Or should no_straight_on restrictions be used at the signs, 
with no access tags on the ways?