Commit to going - you won't regret it at all.
With or without a car you have a few options:
1 - Keep watching and posting on the forum, join in the fun, learn about the various quirks about Le Mans, getting there and what to do when there. You'll get to know people better and vice versa. Then you can make your own way there and meet up with people, or take up a spare seat if one is offered.
2 - Go for the organised coach tour, then it's all sorted and you just follow the crowd.
As Termie says, camping kit is not a problem if you are bringing your own stuff, as all the major supermarkets stock plenty of it during race week.
The choice, as they say, is yours......
MG Mark