My apologies for not being able to type in Thai.

Is this plan likely to be achievable? Especially, Day 5. Thanks for all advice and comments.

Day 5 -     Edinburgh - Lochness - Eilean Donan - Glencoe
         Start        End      Duration Distance
          7:00    10:30    3:30    248 kms    Leave Edinburgh for Inverness
    10:30    11:30    1:00            Visit Inverness and lunch
    12:30    13:00    0:30    21 kms    Leave Inverness for Lochness
    13:00    13:30    0:30            Visit Lochness
    13:30    15:30    2:00    106 kms    Leave Lochness for Eilean Donan
    15:30    16:30    1:00            Visit Eilean Donan
    16:30    17:30    1:00    77 kms    Leave Eilean Donan for Fort Augustus
    17:30                            Stay overnight in Fort Augustus

Day 6 Glencoe - Stirling Castle - Glasgow
          Start       End     Duration  Distance
          8:00    9:15            1:15    76 kms    Leave Fort Augustus for Glencoe
      9:15    11:00    1:45            Arrive Glencoe and sigthseeing
    12:00    14:00    2:00    130 kms    Leave Glencoe for Stirling
    14:00    16:00    2:00            Arrive Stirling (Stirling Castle) 2 hours
    16:00    17:00    1:00    47 kms    Leave Stirling for Glasgow
                                        Stay overnight in Glasgow