My DH has lived away for 12months on the 14th. He also live 250km away on a very very remote community. We've got a long haul left as well. Possibly another 12months (though, lucky me, he's coming home for 8 weeks while I'm really pregnant). We live remotely too.

The positives?
I don't have to cook really if I don't feel like it
There's no-one snoring
The money's good
There's far less washing
I can watch what I want on TV
It's amazing the routine you are able to get into

It does suck being on your own with no help. I have no family within cooee. Some days I feel like I'm just waiting for bedtime. DS is full on. So full on I can only muster the strength to take him out every couple of days.
Hospital appointments are hard.
We do have quite a regular routine. Makes it easier for the kids and me. Also DS goes to bed at 6pm...so any time after that is mine. I love that time of day.
I quite enjoy time on my own (even when DH is here) and I have a few hobbies so to be able to do that feels quite indulgent.

Your DD will get used to it quicker than you can imagine.
Surely he'll be able to visit on his days off? My DH can't but we have special provisions ATM
DH has been allowed to organise to be here for most of my scans. Bosses are generally pretty understanding if your DH is willing to be flexible.
People often don't know you need help until you ask them, so don't be afraid to ask for help. I've built up quite a support network of GFs that have been invaluable.

Happy to chat if you need