Improvement work is to resume on the busy road from Monday.
Andrew Ure was reported overdue from a walk on Ben Vane, near Arrochar, the day after his 41st birthday.
Motorists will be directed along the Old Military Road in Argyll as a safety precaution.
The farm will be on the banks of Loch Long, near Arrochar, and will be used for a "semi-closed containment system".
One of Scotland's biggest plastic problems, the Arrochar litter sink, sits at the head of Loch Long.
An HM Coastguard helicopter rescued 10 motorists stranded from the mud covered A83 and A815.
The Rest and be Thankful - one of Scotland's most famous tourist routes - has regularly been closed by falling rocks.
Police said the 32-year-old man died at the scene of the accident in Argyll last week.
A proposal to use giant containers on Loch Long to separate wild and farmed salmon is rejected.
