Hi FredF,
Just came out of that area on leg one of a solo trip and was in there last year for 8 days (4 on Rosebary) with my two young kids.
Time: Last year from access 2 it took us (me and 2 young kids) 3 hours to get to Rosebary L, with one paddler, including the short 120m portage plus a beaver damn pullover shortly after paddling through Tim L. 20 minutes to Tim L from the access, 20 minutes to canoe through Tim then roughly 2.2 hours to get to Rosebary. The mainly gravel access road up to Tim is in excellent condition (60km/hr). Look out for snappers nest building and egg laying on your drive up, tis their time of year.
From Kearney Permit Office Access 2 is about a 25 minute drive. Access is a small pebbly/sandy beach + a short 12 (partially submerged) dock.
Dark tanic-stained water til u hit Tim Lake, which has ~10 clarity. Rosebary/Longbow has a 5-6 clarity. No real discernable current to the river until after that first portage - and even then its just in a few spots til u hit Rosebary(tight S turns, over beaver dams, at the base of the portage below the falls, etc). Water levels are low this year, so the number of obstructions/current areas may have changed.
Campsites:
Tim Lake: I stayed at the site marked on the map above for a few nites last week and it has room for 3 tents, has a small (2x2) table, decent firepit with a small sandy landing area (although there are about 2-3 landing areas for this site, some along a steep bank). Can't vouch on the island sites, never stayed there.
Rosebary: IMO the site right next to the sandy beach is crappy. Dark, uneven ground + small. We stayed there last year and were very disappointed with it. The beach is a short path walk from that campsite, and we kept our canoe on the beach and walked our stuff up. We enjoyed staying at the one on the east shore, south of the beach marked on the above map while on Tim. Flat, nice sandy landing, very spacious, lots of chippies/squirrels to entertain the kids, grassy, wildflowers, open, sunny, decent firepit if memory serves.
Its a short 2 minute paddle to the sandy beach from there, and the beach is available for anyone to use irregardless if the site next to it is occupied or not.
Longbow: Check the PCI database for site info on this campsite, if you havent done so already. Good sight, historic artifacts, open field behind the campsite with many wildflowers + hide and seek opportunities, very spacious, paths down to the river between campsite and Tim R, fun swimming/wading in the slight current at the canoe landing, sandy/rocky bottom.
Blood suckers
Like most lakes in the Park (and all over Ontario for that matter), lots of leeches in there. Tons seen along the beach on Rosebary and Tim L, River too of course. You can see them coming though, and my son enjoyed playing and collecting them during our stay last year (18 here in his nalgene). This pict taken at the portage, upriver (e.g. west side).
Blackflies are swarming along the lakeshores (e.g. boat landings) and wind-protected side of islands but arent bad at the campsites. Mosquitos are out in force too, and the deerflies and no-seeums were also encountered last week, although still few in number. Did not encounter any horseflies or stable flies yet, likely more towards early July for those. We never do or need bug jackets, but to each their own.
Fishing: Not sure if youre interested in fishing, let me know and Ill post info about it. Should still be lakers catchable in Tim L up close to the surface for another week or so. Brookies too of course.
Wildlife: Lots of moose in the lakes and along the Tim R. Last week when I entered Tim L there were a pair on the island campsite, the one on the south-west shoreline. They (mom + teenager) swam across back to shore towards my site at dusk and wandered up the shallow/weedy bay there. Another mom and her young baby waded/swam just off my site headed south 30 minutes later.
Lots of painted turtles along the Tim R between access 2 and Tim Lake. Paddle slowly and have the kids watch out for them along the marshy/floating banks.
Lots of carnivorous plants in that stretch of the river as well: picture plants + sundews worth it to check those out with the kids.
Bull and leopard frogs abound as well. Seagull babies have now hatched and are little grey fluffballs floating and peeping around their birth places (normally emergent rocks/islands). Watch out for their dive bombing parents.
Enjoy your trip!