I had planned tro brew 5 gallons of an American wheat (hefe) this weekend using Wyeast 1010. Now I have a request to make that 10 gallons instead of 5 but since there are no LHBS near me I cannot get another smack pack of 1010. Thus, I was thinking about using dry US-05 for 5 gallons and Wyeast 1010 for the other five.
My question is can anyone suggest a better dry yeast to try to use instead of US-05 as a substitution? I don't know how long it would take to try to build up one smack pack of 1010 into enough for 10 gallons instead of 5 gallons. I have never attempted trying to build up a yeast to twice the pitching size before and I am not sure of how to go about it. I do have a stir plate.