Y'all have been so helpful w/ my last couple of questions, I figure this one
is worth a try as well:

I'm leaving next weekend w/ my girlfriend for a 2 week camping trip in
Yellowstone.  Will be driving from SoCal in my 90 Carat, probably up through
the south entrance.

I'm guessing there's quite a few campers here that have been to Yellowstone,
so I'd love to hear some general thoughts/wisdom/advice.  I was there as a
kid, 15 years ago, but don't remember much other than big bison and elk.

We'll be car camping out of the van, and hopefully doing a lot serious day
hiking.  My GF is recovering from an ankle injury, so it may be a limiting
factor.

I'm considering bringing bikes, but I'm not sure how good that would be as
our range would be limited (my gf isn't a very experienced rider).

It looks like most campsites don't accept reservations (?), so I was gonna
just see what I can find when I get there.  Any particularly good areas?

I'm aware of the potential for cold temps, and am prepared for and used to
that.  Although, I have been curious about safe/cheap options for heating
the van...?

Anyway, any thoughts about hiking, cycling, driving, campsites, things to
do/see would be great.

Thanks,

James