The trail to Lubok Simpon, the Jenet Muda trail, the Swamp Loop and the trail all the way from the visitor's centre to the Canopy Walkway are all boardwalked. The trail to Tabing hide and those to Blau and Yong hides are not, although Blau and Yong hides are best accessed by boat.
It sounds like you did pretty well. I'll probably PM you about Marbled Wren-babbler and Grey-breasted Babbler.
I know what you mean about binless birder-photographers and excessive playback. Last year at FH a group had located a pair of Red-headed Trogons. Even though the birds were...
Bukit Tinggi: both MPP and FP are seen regularly, the former virtually guaranteed.
Krau: no, not this year AFAIK.
Taman Negara: a tough place for birding, with enervating heat and humidity. I didn't see any of those species in 2 1/2 days there. A number of people have commented that TN is...