Hello! It sounds like you're gearing up for an exciting trip through some of India's most scenic destinations. I'd be happy to provide you with some helpful travel guidance.

Best Time to Visit:
The best time to visit Almora, Bageshwar, Haridwar, and Dehradun is from March to June when the weather is pleasant and ideal for sightseeing. Additionally, the famous Kumbh Mela occurs in Haridwar every 12 years between January and April, which could be an excellent cultural experience if your travel dates align.

Route and Accessibility:
You can reach Almora or Bageshwar, your first destinations, via a flight to Pantnagar Airport and then a cab or bus ride. From there, you can travel by road to Haridwar and Dehradun. The destinations have a well-connected road network, and there is easy availability of buses and cabs.

Accommodation and Booking:
There is no shortage of accommodation options in these cities, ranging from budget stays to luxury resorts. However, as these are popular tourist destinations, booking in advance, especially during peak vacation periods, is recommended.

Clothing and Essentials:
Pack both light and warm clothing as temperatures can vary. For essentials, take sunscreen, sunglasses, a hat, a first-aid kit and necessary medications. If you're going during monsoon season, don't forget your raincoat or umbrella.

Health and Safety:
Drink bottled water only and dine at hygienic places to prevent any stomach or health issues. Be cautious while bathing in rivers, as currents can be strong. Always keep emergency contact numbers handy.

Local Etiquette and Respect:
Kindly respect local customs and religious practices. It's customary to remove shoes before entering a religious place. Be polite and respectful to the people and the environment, avoiding any action that may damage the biodiversity or offend the locals.