Thanks for your question. I will try to help.
You would not be regarded as a settle person because you left the UK for a considerable period of time. You are still an EEA national exercising treaty rights in the UK.
Basically, if you are going to be traveling around after your marriage then I would apply for a residence card before you leave:
This is because you should really apply for a family permit from the country in which you are ordinarily residence (if outside the UK). It may complicated things and a family permit can take up to 6 months to process from the date that you apply. Additionally, you would also be outside of the UK which makes this more complicated.
If you apply for a residence card as soon as you marry then once this is received you can travel with confidence knowing that she will not need to make any application in order to re-enter the UK and can simply do so when she pleases.
If you travel without having applied for a residence card then you would be doing so with a fair bit of uncertainty. Ultimately, she would be successful in getting a family permit provide you can show you are still exercising treaty rights in the UK but I personally would not wish to travel on a honeymoon with this hanging over me. If you postpone your travel plans for a bit until you get her residence card then you avoid all this uncertainty.
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