1 I don't see why not.
2 Absolutely, but convection will be key....in other words: keeping water circulating in the tub.
I have used a kiddie pool with good success. The key is to let water overflow out of the tub by having a running hose pointed at the pot. Have the hose as high up on your pot as you can without getting water in the pot. I bungied my lid on real good and put a towel over it.
Note that there will be a lot of overflow water so don't do this uphill from anything you don't want to get wet.
BOTTLED: "Route 66 IPA" 7% ABV, "Dave's Imperial Stout" 12% ABV , "Spider Imperial Stout" 9%ABV , "Mutt Irish Ale" 7% ABV, "Sorta Sierra" IPA's 4.4% ABV, "Habanero Ales" 5.5% ABV, "Pumpkin Seed Ale" 5.5% ABV , "Marzen" Lager, "Step child Ale",
PRIMARies: "Caramel Amber" , "Black Porter"
SECONDARIES:1 :"Miller Ale"
On DECK: Another Russian Stout