Impetigo: This is a highly contagious bacterial skin infection that matches the description provided. It often starts with blister-like lesions that can appear "wet" and then scab over. The scabs can repeatedly come off and re-form, and the infection can spread to other parts of the body. The clear to slightly yellowish fluid and the fact that scabs pull on hair are also consistent with impetigo.

Contact Dermatitis: Although the patient denies itching, contact dermatitis could still be a possibility, especially if the patient came into contact with an allergen or irritant during their vacation. The rash's appearance and progression could fit this diagnosis, though the lack of itching and the specific description of the lesions make it less likely.
Eczema (Atopic Dermatitis): While eczema typically presents with itching, it's not unheard of for patients to have minimal or no itching, especially in the early stages. The appearance of the rash and its spread could fit eczema, but the blister-like initial lesions and the clear to yellowish fluid are not typical.
Folliculitis: This is an inflammation of the hair follicles, which could explain the scabs pulling on hair. However, folliculitis usually presents with more pronounced redness and pus-filled bumps, and the description of initial blister-like lesions doesn't perfectly align.

Meningococcemia: Although extremely rare and usually associated with fever and other systemic symptoms, meningococcemia can present with a rash. The rash can start as blister-like lesions and progress, but it's typically accompanied by severe illness. Given the patient's lack of fever and systemic symptoms, this is unlikely but should be considered due to its high mortality rate if untreated.
Staphylococcal Scalded Skin Syndrome (SSSS): This condition, caused by staphylococcal toxins, can present with blister-like lesions that progress to scabs and can affect large areas of the body. It's more common in children but can occur in adults. The lack of systemic symptoms and the specific progression described make it less likely, but it's a condition that requires prompt treatment.

Pemphigus Vulgaris: An autoimmune disease that can cause blister-like lesions on the skin and mucous membranes. It's rare and usually presents with oral lesions first, which are not mentioned in the scenario.
Bullous Pemphigoid: Another autoimmune blistering disease, which is rare and typically affects older adults. The description could fit, but the age of the patient and the lack of other symptoms make it less likely.