It's good to start off with a small event which gives you a bit more breathingroom. However, some comments, and important ones.
When working alone, as I mostly do, you are allways limited to one camera which can be controlled. Putting out a second unmanned camera is asking for problems. This time it went well but I can assure you that your luck won't last.
There are several things to consider when you use a second cam, first you don't have any control which will result in images out of focus or too dark if f.i. it's cloudy outside and suddenly the sun appears. If you put the cam in automatic mode you have a risk that it will make the wrong adjustments, if you put it in manual you could also have problems in changing conditions.
Second is that you attach the radio receiver to that camera, again you don't have any controll about what happens and third and very important:
If you put your camera on a tripod unattended, ever thought about what might happen if someone (Children f.i.) would trip over one of the leg smashing your borrowed camera to the ground?
Another thing to consider is how both camera's match up with their images, there you have to do some testing because otherwise you end up with a lot of colour correction in post which won't do your images any good.
You allready mentioned it about the battery life which could be an issue if it runs dead just before an important moment.
I must say you do a lot of effort in getting it right, especially considering you are working alone, only you really have to be carefull about the risk you take. I also hope you don't take my comment too personal, because I mainly work alone as well and doing a wedding every week the following months I have a bit experience in the problems you can encounter. The advise I gave was therefore ment well.
I really enjoy reading these 'stories', especially the ones were a lot of things goes wrong

and believe me, I allready had my share of it.

Maybe we should have a topic, some kind of "blooper" stories about things going wrong during filming a wedding or any other event, that must be fun to read.
