I too am type 1. There are 2 that come to mind: Clen and gh. Both seem to decrease insulin affinity (or increase resistance). I've found that gh at ~ 5 IUs/day or any effective amount of clen can require up to 2 or 3 times the amount of bolus type of insulin (I don't use my pump anymore) ...the long acting was up to about 130% of 'normal' for me ..quick bolus stuff was typically 2-2.5x (again vs. normal).
I don't know if you've tried, but timing your creatine intake with your bolus peaks can really work well. It doesn't effect the bs much, but a small small amount since creatine is getting transferred instead of glucose ...but I've noticed almost no difference in effect on bs levels.
As far as other gear...I haven't found a big difference. Maybe a sliiiight decrease in bolus. I don't know how often you check your blood sugar, I'm typically 6-15x per day (depending on the day). Keep a close eye on it ..check as often as possible (I use forearm, so my fingers aren't a worry).
We have a little advantage over non-diabetics...we can use our insulin to help us (being very carefull). I've had many friends ask about using insulin and I tell them to stay the eff away from it (as you know, it can kill you in less than an hour).
This is just info from my experience ... no real scientific evidence to prove it.
Good luck ...stay healthy!