Recruit anyone you can if you want a pacer. Typically the easiest section to recruit a pacer for is Hope Pass because of the views and it is early enough in the race. The Twin Lakes to Half Moon section is the next easiest section for recruiting a pacer. The final crossing of Sugarloaf is the most important section to have a pacer and often the most difficult to find a pacer for due to the late hour and the difficulty of the ascent. If you are lucky you can find a pacer at an aid station during the race.
Some pacers arrive at an aid station looking for any runner.
The easiest place to find a pacer at an aid station is Twin Lakes.