I went with 100' of 2" poly from home depot, a 1' section of 2" clear PVC with a vacuum break hose bib on a 'T', and a 1.5" MIP to slip using a double clamp collar. I need to make some sort of support for the 'T' fitting to prevent the clear hose from sagging. But when backflushing, you sure can see all the **** in the water! I plan to bury the hose going across the yard this weekend. The whole run is downslope so it should self drain.
In retrospect, it would have easier and cheaper to go with 1.5", but bigger is better!