i don't see anything exotic or dangerous in what you are trying to do.
I need to fail over a dozen guests from our primary site to our secondary. Our only option is to use SRDF to replicate an entire LUN (datastore) . I need to know if the below procedure will work. I may have left out some VM steps this us close.  1. Create vmax R1/R2 devices and create replicated device group 2. Add R1 (source site) and R2 (destination site) to masking views 3. Storage vMotion guests to new R1 4. Change IPs on all guests then power them off 5. Wait for R1 to sync R2 6. Change roles of R1 and R2, R2 now R/W, R1 now R/O 7. Import R2 into ESX farm and power on guests  Thanks.
Replicate VMWare/ESX 5.0 Datastore With SRDF