I'm a BM in a wedding (cowboy boots, if you remember

) and I'm out of state (6 hour drive or hour flight). I just got a new job and it's been tough to be as involved in the wedding as I would like to be, being out of state and working full-time. I did, however, fly into town for the bridal shower a couple weeks ago, and the bride was surprised and very grateful to see me, but I had to fly back out that afternoon due to work.
The bachelorette party plans were up in the air for quite some time because the MOH was having a difficult time organizing a date that would work with everyone. Yesterday, MOH tells me that the date will be this Friday evening (very short notice). I told her that I would love to attend, but it wasn't possible, unfortunately, because I work Mon-Fri and some Saturdays. She texted me today to let me know that the date's been moved to Saturday now. I want to leave Saturday open, though, because I am probably going to need to work.
I just got this job nannying for a family of a 3 month old full-time so the mother can go back to work and I'm nervous about asking for her to find a replacement for me on such short notice. My gut instinct is that I should decline the BP because I'm already driving up there next weekend for the wedding, I just came back from a trip up there for the bridal shower, and I know that I'm going to get asked by the mother of the 3 month old to watch the baby this Saturday during the day. I could hop right into my car and make the trip up there for that evening's festivities, but it doesn't feel practical.
I let MOH know that it was going to be tough for me to swing the BP because mom of baby is probably going to ask me to watch her during the day on Saturday. Maybe MOH feels that I should just decline to watch the baby and make plans to be at the BP, but I really don't want to turn down any work right now. I want to be a good BM and bend over backwards as much as I can, but I feel like I'm stretching myself a bit thin if I make two trips up there within the next two weeks.
What are your thoughts? Would you be offended if you were the bride? Or MOH? Thank you in advance, as always, for your insight and advice!