The PGCE is the easy bit, so be warned. The NQT year is the real killer, where you HAVE to front up each and perform whatever is going on at home.
Teaching is full of unexpected pleasures like staff training after hours, parents evenings, putting up displays, marking, and don't forget the planning. That cannot be done in a couple of hours until you have been teaching for a couple of years, and you also have to factor in all the government initiatives that will impinge on your lesson plans and mean that whole schemes of work have to be rewritten.
I did my PGCE at Marjons in 2000 when dh was a DS at the JSCSC Shrivenham, and that was tough even with my Mum around to help with child care when I needed it. It was also difficult when he was back in Devonport as we both worked long days, but I nearly always ended up doing the school run, the domestics, the cooking, plus teaching full time in secondary across 5 subjects.
He was then appointed abroad and went unaccompanied, so more of the same for me, except he wasn't about and only came home every six weeks. That was really tough, and I often worked til 1830, got home after picking ds up by 1930, spent 60 minutes with him before his bed time; sorted clothes for the next day, grabbed some soup if I had time, and then did marking/planning/resourcing etc for the next day. I left home at 0730 via ds's school and repeated the process.
I moved to be with dh abroad in 2006 as he had another appointment here, and he says it took 18 months for me to destress and revert to a human being/wife/mother/me instead of a teacher. It's a great job, but is hard to do half heartedly, or it was for me; I lived and breathed my job and never seemed to switch off fro it. Teaching is all absorbing and means that you may not be able to do things with and for your own kids. I couldn't go to school assemblies for example, or sports days, as I was working, which was sad for ds when dh was abroad.
You also need to have all your ducks in a row for if your kids are ill. there is only so much time you can take for that before people get pissed off, especially if you are eating into the schools budget by having to pay for cover for you.
I am not trying to put you off, but I did this for 5 years and although I loved it, I needed to step back from it and be a SAHM for a while - I went back to my previous job when ds was 6 months old, and only stopped working in 2006. It is very difficult to cope without family support, I was lucky my Mum had moved to Devon, and was only 10 minutes from me, so could field ds when he was ill and feed me once a week to make sure I ate.
Also, in primary bear in mind that you have to teach all the subjects, unlike secondary where we get to specialise, so some days I could teach the same lesson with tweaks according to the class, three times, which cuts down on planning. You won't have that luxury.
Good luck with whatever you decide...and what is an OOA? We don't have them in the Navy.