You missed avoiding the rate hike for Hilton rewards, but you can transfer 1 CO -> 2 HH, takes 90 days. If go throught the Amtrak route, the 25K cap will apply, but it will only take weeks. Considering you need it by July, that would not be the way to go.2

25K HH points per night @ category 3 (mid-level) Hilton property.

http://www.hilton.com/en/hhonors/rewards/hotel.jhtml