I'd imagine any Stranraer players are more likely to play with the under 20's unless there's a change in rules. Last season overage players were allowed. Think it would be more logistical reasons for them playing with the 20's rather than the south team as the majority of first team players are more central belt based.
The club haven't really mentioned their plans with the South team, what age they plan to run with, management team etc. At a guess I think Alan Jenkins will be quite active with them given he's turned down a new deal at Ballymena and is current head of youth.