You should have no problem with an overnight at the smartly upgraded RA Bothy. Very little, if any, stalking done on the Feshie side of the Estate now and I guess now that the Gaick, upper Tromie, is now part of the enlarged Estate where any stalking will be done in that area?
The Feshie area is becoming more of a nature reserve nowadays and the Estate, have at considerable cost, made the most luxurious accommodation available to walkers.
I recall an overnight camp below Tom Dubh just above where the two streams come together.