Summary

Here's roughly the route we took on our journey and some costs:

From KL (Gombak) to Jabor exit (route E8), distance was 228 km.
Tolls: Gombak - RM5/-, Karak - RM3/-, East Coast Highway - RM21/-

From Jabor exit to Kuala Terengganu (route 14), distance was 182 km.
KT Traveler's Inn accomodation: RM79/- per room per night

From Kuala Terengganu to Kuala Besut (route 3 and route 84), distance was 126 km.
Overnight parking for 2 nights was RM??.

Holiday package costs: RM1,200 for 2 adults and 2 kids.
Accommodation at Perhentian Island Resort, inclusive of breakfast.
Package includes boat transfer to/from Kuala Besut to Perhentian, rental of snorkeling gear and life jacket, 3 hours of snorkeling excursion on day 1, and 9 hours of snorkeling excursion on day 2, which includes a trip to Pulau Redang and Pulau Lang Tengah, and lunch.

Marine park costs: RM5/- per adult.

From Kuala Terengganu to Jabor entry (route 3), distance was 190 km.