I have many customers that use range. Basically the pea acts as a damper, if control is your goal then it's ideal. You won't get as much heat out of it though in the short term. For example I have a customer that burns about 15 tons a year in 5 ton installments. He usually gets range the first load, nut the second and range the last. He also prefers to have more nut than pea in it for the range loads.
My suggestion is you get the nut and purchase a few bags of pea and try a few combinations. FYI most stoves that burn nut will also burn straight pea.
On a final note avaialbility of range is going to depend on your supllier. It's not avaialable at the breaker as a size. In my case I load each seperately but in the same compartment. It thoroughly mixes as it's being offloaded.