I do it myself. Last year I used a double-crush emasculator (crushes and cuts at the same time) for the tails. I only had 5 ram lambs, and I didn't castrate before I sold them. I likes the emasculator because once we got the hand of it, there was no blood, and even when we were docking our first lamb, they only cry for about a second. Once the tail drops off they settle down, and we hold the clamp down for a minute or so. When done well, the end of the tail looks surprisingly neat (as in no blood, even cut) and it heals fast. We trickle some pine-tar on to prevent flies and some bloodstop powder just in case. Also, whatever method you use, be sure the lambs are either protected through passive transfew from the ewe for tetanus, of give them a tetanus antoxin shot at the time of docking/castrating. I never use all 4.5ml that come in the bottle for a lamb, but I use 1.5ml. This year, I"m vaccinating my ewes, so I won't need to give my lambs the tetanus antoxin...its cheaper to vaccinate the ewes, especially if you expect to have multiple births.
I just banded a yearling ram's tail 3 days ago. After talking to dozens of people, most recommended just banding it. It was so non-eventful. He didn't even notice. I gave him penicillan for 3 days, and tetanus antitoxin when I did it. He seems just fine, and I think I'll do my 4 tailled ewes that way too. I have them penned up tonight to do tomorrow after I pick up some more tetanus antitoxin.
I'd imagine having the vet out to do it for all the lambs would be cost prohibitive. Ross, what does your vet charge for the vasectomy? I'd eventually like to have a teaser ram, but I'm worried about the 5% fertility that crypting a lamb would have...I'd rather be sure he's sterile.