We are using Doubletake, and the server folks say it cannot be used across subnets, both boxes need to be in the same broadcast domain. If that is true (I am no server expert and am taking their word for it)then your simple network will not work, unless you use bridging instead of routing. If you can use the configuration you describe you will need a static route on each side pointing to the other fe subnet.
Location 1
ip route 10.1.3.0 255.255.255.0 10.1.1.2
Location 2
ip route 10.0.0.0 255.255.255.0 10.1.1.1
Or you could configure a dynamic routing protocol like eigrp on each side.
router eigrp 100
network 10.0.0.0