-- Last Updated: Feb-10-11 12:38 AM EST --
Algo has a lot of kids/teen camps and is a favorite for neophyte campers. So if you time your visit to dates before kids are out of school or when they are back in school you may not see a soul for a week.
I often go in early to mid June and marvel at the "ghost town" feel. Its really eerie as the connections with a hundred years ago seem really intense. Now June is the height of blackfly season and that alone deters many. As I live in blackfly country there is no way that any tiny creature is going to impact my travels. Just bring a good bug jacket and DEET.
The other time I like to travel is after Labo(u)r Day. Again most people have to be back to school and work.
I usually go to the north and east off Rt 17 as that is closest to me. Supposedly the least pressure from canoe parties.
Get the campsite map from Jeff McMurtries site http://www.algonquinmap.com/
and visit www.algonquinadventures.com. Click on forums if you have questions.
At any rate it is nothing like the BWCA in terms of campsite competition.