Dryland Swimming for those with no access to a pool

[Nukem]

I'm temporarily in a location that has no access to a pool.  I'll be here for about 6 more months, so for that time, what can I do to help maintain my swim fitness? 

I've been using elastic bands to do some swim simulation, but it just doesn't seem adequate.  Any suggestions?

[doc]

get an old skate board
then turn the wheels around side ways .
then get some garden gloves for your hands
and there you go
you do land  based swimming ,
the skate board  across the front of the ankles
and way you go ,
swim eer  i mean hand walk paddles 10 x 100 of that and see
how it feels eating your dinner for a couple of nites
burn baby burn ,
will be come your favourite song