Hi Susan welcome to the forum..
I've come across somebody in similar position to you a few years ago, while she and I were fighting for pump funding (often easier to achieve now a days)..
If I remember rightly when the pancreas is removed then this also effects the liver and your body loses the safety net of being able to dump glucose into the system as no hormone response from the pancreas!
The pump is a pretty good piece of kit, and yes would be suited to your particular set of problems, a lot of things about pumps that make them very flexible indeed, as you use them pro-actively and reactively a lot easier than using injections..
You would find have 3 different bolus mode idea to help match the adsorption of high fat foods, and if you then over shot a slightly you have the advantage of the extended or multi-wave to stop it delivering any more insulin, or even using a Temp Basal rate to slow off the insulin etc...
As to Islet Transplanting, something I haven't looked to in great depth, as it's something I personally would consider, but I assume that you would need a pancreas to actually transplant the Islet cells into.. Part from that having to take anti-rejection drugs which can come with their own side effects.. Also very few can stop their insulin completely and this only tends to last for a short period of time as it's still a treatment in it's infancy... But worth looking into to see if it maybe a possibility, if it is how you feel about the idea,