for my family side preferably NO...

1. baby may no able to sleep well while traveling, baby must have more rest and sleep for proper growth...
2. 3 months old baby still quite "fragile", anything can happen even though camp at house...
3. baby need required "sarong" to sleep easily which your baby comfortable with, otherwise it is a nightmare if baby no willing to sleep on flat mattress and it is torturing the baby if keep awake...
4. you may need Plastic Baby Bath Tube for safety reason when taking bath for baby...

AMO, better play safe for short rather than regret for long... maybe you can bring ur baby go to genting highland for a try first before cameron highland, at least genting have proper medical facilities and genting ambulance can "drift" till general hospital KL / universiti hospital PJ if worst case happened...