Airfare and car rental prices

As of 1/13/14, Alamo, full size $326/week ($47/day) via kayak.
Alamo, mid size SUV $444/week
Alamo, mini van $444/weeks (airportrentalcars.com)
Avis says "sold out" for the location on that date ??!!
expedia.com has the same rates for Alamo, with higher rates for Hertz, National, and Enterprise
National, $402/week full size car, $497/week std suv, $497/week, mini van, nationalcar.com
Thrifty says no rates available for one-way.
Air:
$507 United BWI 4:11p, JAC 8:35p 6h 24 m 1 stop (DEN) (would get the kids to bed abt midnight EST)
                    BIL 10:22a, BWI 6:14p, 5h 52 m 1 stop (DEN)
Same flight on 5/10- 5/17 $466.  Mar 1-8 $609. Apr 5-12 $517.
$548 United DCA 8:35a - 12:47p, BIL 10:22a - 6:14p.
$597 Delta BWI 7:20a, JAC 12:08p, 6h 48m 1 stop (SLC)
         BIL 6:20a, BWI 1:48p 1 stop (MSP)
Same flight on a Saturday in June 21-28, $807.  May 10-17 $459.  April 5-12 $434. Mar 1-8 $642.