If the AT is open, I’d say go for it! If there’s little snow on Katahdin, White Cap should be clear too. But expect and prepare for snow/ice up high. The snow melt run off will be past south of the West Branch (the river Abol Bridge spans), but you might still find “interesting” stream crossings inside Baxter, and north of Monson. Hurd Brook should be OK, last May 14th it was just a rock hop. Remember that Abol Bridge will be closed to cars until May 20th or so, open to hiker foot traffic only. Call BSPHQ for Katahdin Trail info, and I’ll let you know about Hurd Brook and the AT around Abol Bridge when I get back from the May 3 trip.
There’s a great public campsite called Abol Pines right across from Abol Bridge, with privy and ‘iron ranger’ to collect the $6 fee.
TJ aka Teej