Loop Line Conundrum

In a wee bit of a pickle. As you lot know most railways run end to end and this was also true for the the Skarloey until 1965. On most railways its introduction wouldn't be a major headache but as the various 2' 3" railways all had their platforms on one side or the other this lead to their various coaches having doors on one side only. This shake up is what i'm stuck on as currently i'm building kits for the TR's No.9 & 10 counterparts. Now despite what the TR and TTTE wikis briefly summarise their alleged basis can't actually be the basis of Gertrude and Millicent as their current forms came about between the 1967 and 68 seasons while Gert and Mill had popped up by no later than 1958 which is when Skarloey first sees them (1959 is when Mr Peter Sam is said to have discovered the first of the nine saloons, of which the Corris based VIP example is one of these, so assuming the pair are of the same lot sold off in 1936 the date is an oversight).
Anywho getting back to the crux of the issue by the time trains get to Lakeside passengers would have to dismount on the opposite side.
sta.sh/0q1tmnh2ui9
*If going clockwise it would be fine until they returned to Rheneas but 'Patience is a Virtue' and 'Pop-Special' show the trains going anti-clockwise.
Now this leaves two options as far as I can can see.
I) There is some unstated loop or turning triangle between Rheneas and Lakeside as exampled in the above diagram which corrects the coaches.
II) All the coaches become duel doored. The original TR stock were actually built this way and the brake even had two lookout duckets for a time so restoring them to an earlier state wouldn't be impossible. Likewise Millicent and Gertrude could be retrofitted post loop but my own kits of the TR counterparts should be built with doors on both sides from the get go and likewise for any other bogie stock built for the TR from around 1963 onwards. A Corris style saloon would look the most different however but this single loop only set up does give cause for the turntable installed behind the engine shed in 1965. The half and half option would be trains containing any vintage stock would have to use the second loop/a turning triangle or for there to be narrow platforms installed on the opposite side of every station to still allow for those passengers to mount and dismount.   
Thoughts?