this sounds exactly like our vacation last february!! Lo was 5 mo and had just gotten over paci addiction and was finally almost sttn and napping well, then we went away and she short napped, and was up every hour all night!! it was horrible. good news is that it totally went back to normal when we got home, it just took about a week of pu/pd and strict routine when we got home and she was back on track.
vacations are tough, especially if there's a time change. i would do the best you can, don't worry about AP if you have to to get him to nap and just deal with it when you get back home. no point shh patting when you're supposed to be enjoying your vacation
fwiw, i think our problems on vacation were her being way too OS during the day so she ended up short napping because she just couldn't wind down - way too much excitement with all the cousins etc, and since she was short napping, even though i did try to get more in the day, she was really OT which caused all the NWs. i also fed to sleep during the night 5 or 6 times some nights, and even that didn't work every time.
hang in there and try to enjoy yourself