I did check thrill data the night before to check availability. It took me about 45 mins with modifying times (booking 5-6 days of a 10 night stay). I had a spreadsheet (keeping track of ADRs, shows etc) and numbered each purchase (had a running total so I knew I didn’t miss anything) and had divided each day’s purchase by priority. Surprisingly I was able to book without any major IT issues on my phone - home WiFi (vs desktop). 30 mins would be the minimum. Maybe book top priorities and then book the rest during your break (do take a phone charger)? Unless it’s spring break you should be ok coming back to book/modify later.