If I may make the list of the must have prop hunt maps :
arena_desolation_pb1.bsp.bz2
arena_farm_feud_b1.bsp.bz2
ph_basalt_a2.bsp.bz2
ph_canyon_a1.bsp.bz2
ph_cchotel_b3.bsp.bz2
ph_goldtooth_a1.bsp.bz2
ph_grassland_a1.bsp.bz2
ph_harvest_event_a1.bsp.bz2
ph_headquarters_b3.bsp.bz2
ph_lumberyard_a2.bsp.bz2
ph_manor_event_a1.bsp.bz2
ph_manorgrounds_a4.bsp.bz2
ph_maze_a4.bsp.bz2
ph_mountain_a2.bsp.bz2
ph_sawmill_a2.bsp.bz2
ph_spookyharvest_a3.bsp.bz2
ph_switcheroo_a4.bsp.bz2
ph_watchtower_a1.bsp.bz2
Also a !propmenu command can be added, to let people choose their prop (or if you prefer a !propreroll command, where you can get another random prop if the first doesn't look nice, but you can only reroll once per round)