Hard to say. In the summer the town fills up with tourists and gets expensive. Tourists are probably not your market. Same for Xmas. I would suggest trying to get a couple of pre-bookings with reliable ECCIE or TER members. Be wary of guys who claim to be member but cannot prove it.
Hi Rachel, I do not make it to Santa Fe very often, but I will be in ABQ on the 20th - 26th. If your going to be in that area make sure you let me know ;-)
October!! - ABQ Balloon Festival is rolling and both ABQ & Santa Fe are FULL! Also, at the end of Oct the Hatch Green Chilies are roasting all over the state....it's awesome.
If you like the outdoors fall is a great time to visit. Or during ski season in winter. Summer brings you the opera and summer/fall there are tons of art shows happening. Check out the Santa Fe Reporter online for event info and non touristy food reviews as there is a great foodie culture in town. Many of us in the scene up here need a little more advanced notice to 'play' so that's always helpful as well. Safe travels!