Is it worth getting this vaccination?
The nurse (when I was having Rabies) said it wasn't worth it unless I was going to be staying on a farm, near paddy fields, with lots of people in close contact. However, it is spread by mosquitoes during day time in those areas.
My itinerary in SE Asia takes in some inland areas in Cambodia, Laos, etc. but only on the usual tourist trail.

What about:
- Angkor Wat
- Mekong
- travelling in transport with animals (probably cheap transport)
?

anyone?
It costs about £170 and chances are low but I don't know whether I will be in regions/paddyfields.
The nurse said it's a complex life cycle involving pigs and water so unlikely to happen unless you are staying with a family on a farm.
Cycling through or motorbiking rather than bussing might be slightly higher risk.

The transmission season appears to be May-October and I will be there November probably.
Only seems to be endemic in places like Chiang Mai.

Start here.

and here.

I don't have personal experience but this is one that alot of people seem to opt out of (I'm not saying that's good or bad, just putting it out there). This fact sheet gives some good bullet points about the seasonality of the disease transmission, etc. Unless I knew I'd be in a rural area for an extended period of time I'd probably just stick with good consistent bug dope and protective clothing. That's just my own opinion though- you gotta make up your own mind.

EDIT: Just thought I'd add- many viruses/parasites have 'complex' life cycles. This generally just means at different stages of life they are parasitic to different animals. That doesn't make it necessarily harder to catch said virus or parasite, it just means you aren't the only animal effected. of course its relatively easier to kill these parasites because you have multiple opportunities to interrupt their life cycle but given rural life styles/lack of funds that doesn't mean it will happen.