My personal opinion....we have enough outdoor clubs for the number of people racing in the area at the moment...with Tivvy and WORM you've already got a full calender of Sunday racing within and hour of each other.
But...indoor...is a different story! If you can find another good venue like you have, but with a more open track area, and on a more permenant basis, you'll be able to develop the space more, and I reckon you'll pull a few more people along.
Probably not loads more than you have now, but you've seen Yatton grow slowly, I think that will continue, especially if you can find something even better!
Tough ask though...not many spaces that big with low enough rents!
Sad news, but good luck with the hunt...must try and get along again sometime
