For the next 9 years we will usually travel in mid June-mid Aug, but could throw in a Feb (prez day) trip, or more rarely a Dec trip.
let me repeat: use year month is only an issue if you need to cancel. it has nothing to do with when you can call to book a stay. if you never have to cancel, UY is a nonissue.
no UY would cover every month - june sounds like it would work for you and just leave a minor risk if you need to cancel the feb reservations, as the banking window for a dec UY closes on jan 31.
some examples to help explain:
if you have a june UY and a may 2012 trip and you need to cancel 60 days out, your banking window closed on jan 31, 2012 so you'd have to use all of the pts in the reservation before they expire on may 31, 2012.
if you have a june UY and a june 2012 trip and you need to cancel 60 days out, your banking window won't close until jan 31, 2013 so you'd have until then to decide whether to use current year (2012) pts for a reservation in that UY or else bank them to the next year. (you'd still need to use any banked and borrowed pts by may 31, 2013.)
if you have a june UY and a may 2012 trip and you need to cancel 5 days out, the pts would turn into "holding" pts so you'd have to use all of the pts in the reservation subject to a 60-day-out limitation - but that won't matter since they expire on may 31...which is less than 60 days out.
if you have a june UY and a june 2012 trip and you need to cancel 5 days out, the pts would turn into "holding" pts so you'd have to use all of the pts in the reservation subject to a 60-day-out limitation - but at least you'd have 12 months before they expire on may 31, 2013 to decide what to do with them.
more info about UY is here if you need it:
http://www.disboards.com/showthread.php?t=1942668