Yosemite national park lodging (20 miles) 6/28, and 6/29 for 2 person.
Below $100 per night.

Hello Wchang721

According to the TravelHero.com website there are a number of lodgings
that would suit your need.  A full list of the lodgings within 20
miles can be read here:

http://www.travelhero.com/destinations/park.cfm/parkname/YOSEMITE_NATIONAL_PARK/

Of the lodgings listed the following lodgings have places available on
the dates indicated above:

1) CURRY VILLAGE, YOSEMITE NATIONAL PARK, CA, UNITED STATES - $64
(standard rate non heated canvas ten cabin for 2 people) - within 1
mile of Yosemite National Park
http://www.travelhero.com/prophome.cfm/id/92168/parkname/YOSEMITE_NATIONAL_PARK/typeid/1/index.html

2) BEST VALUE MARIPOSA LODGE, MARIPOSA, CA, UNITED STATES - $89 (rack
rate 2 queen beds newly remodeled non smoking) - 17 miles from
Yosemite National Park
http://www.travelhero.com/prophome.cfm/id/123421/parkname/YOSEMITE_NATIONAL_PARK/typeid/1/index.html

3) SUPER 8 MOTEL, MARIPOSA, CA, UNITED STATES - $79 (regular public
rate nonsmoking room with one king bed) - 17 miles from Yosemite
National Park
http://www.travelhero.com/prophome.cfm/id/70613/parkname/YOSEMITE_NATIONAL_PARK/typeid/1/index.html

4) COMFORT INN, MARIPOSA, CA, UNITED STATES - $72 (1q aaa natl rate no
smoking handicapped remote control tv computer hookup) - 17 miles from
Yosemite National Park
http://www.travelhero.com/prophome.cfm/id/91450/parkname/YOSEMITE_NATIONAL_PARK/typeid/1/index.html

5) BEST WESTERN YOSEMITE WAY STATION, MARIPOSA, CA, UNITED STATES -
$89 (standard rate no restrictions 1 king 1 double) - 19 miles from
Yosemite National Park
http://www.travelhero.com/prophome.cfm/id/70603/parkname/YOSEMITE_NATIONAL_PARK/typeid/1/index.html

As with all requests of this nature I would recommend dealing first
directly with the establishment in question.  They are likely to be
able to give you a good deal if you talk to them directly; if this
fails to produce a price as low as indicated at the above sites then I
would book through the websites above.

If you have any further questions regarding this subject please ask
for clarification and I will do my best to help.